diff --git a/app/src/main/java/info/nightscout/androidaps/plugins/PumpCombo/ComboPlugin.java b/app/src/main/java/info/nightscout/androidaps/plugins/PumpCombo/ComboPlugin.java
index 96b5b2f4d0..0fe788d72e 100644
--- a/app/src/main/java/info/nightscout/androidaps/plugins/PumpCombo/ComboPlugin.java
+++ b/app/src/main/java/info/nightscout/androidaps/plugins/PumpCombo/ComboPlugin.java
@@ -141,7 +141,8 @@ public class ComboPlugin implements PluginBase, PumpInterface {
                         long now = System.currentTimeMillis();
                         long fiveMinutesSinceLastAlarm = lastAlarmTime + (5 * 60 * 1000) + (15 * 1000);
                         boolean loopEnabled = ConfigBuilderPlugin.getActiveLoop() != null;
-                        boolean ignoreLastFailedTbrCmd = SP.getBoolean(R.string.key_combo_ignore_transient_tbr_errors, false)
+                        boolean ignoreLastFailedTbrCmd = SP.getBoolean(R.string.key_combo_enable_experimental_features, false)
+                                && SP.getBoolean(R.string.key_combo_experimental_ignore_transient_tbr_errors, false)
                                 && localLastCmd instanceof SetTbrCommand && ignoreLastSetTbrFailure;
                         if (now > fiveMinutesSinceLastAlarm && loopEnabled && !ignoreLastFailedTbrCmd) {
                             log.error("Command failed: " + localLastCmd);
@@ -554,6 +555,20 @@ public class ComboPlugin implements PluginBase, PumpInterface {
         if (unroundedPercentage != roundedPercentage) {
             log.debug("Rounded requested rate " + unroundedPercentage + "% -> " + roundedPercentage + "%");
         }
+
+        TemporaryBasal activeTemp = MainApp.getConfigBuilder().getTempBasalFromHistory(System.currentTimeMillis());
+        if (!force && activeTemp != null) {
+            int minRequiredDelta = SP.getInt(R.string.key_combo_experimental_reject_tbr_changes_below_delta, 0);
+            boolean deltaBelowThreshold = Math.abs(activeTemp.percentRate - roundedPercentage) < minRequiredDelta;
+            if (deltaBelowThreshold) {
+                log.debug("Skipping setting APS-requested TBR change, since the requested change from "
+                        + activeTemp.percentRate + " -> " + roundedPercentage + " is below the delta threshold of " + minRequiredDelta);
+                PumpEnactResult pumpEnactResult = new PumpEnactResult();
+                pumpEnactResult.success = true;
+                pumpEnactResult.enacted = false;
+                return pumpEnactResult;
+            }
+        }
         return setTempBasalPercent(roundedPercentage, durationInMinutes);
     }
 
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 4d0ea04beb..4f95d46808 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -718,7 +718,14 @@
     <string name="combo_enable_experimental_bolus">Experimental bolus</string>
     <string name="key_combo_enable_experimental_split_bolus">combo_experimental_split_bolus</string>
     <string name="combo_enable_experimental_split_bolus">Experimental split bolus feature</string>
-    <string name="key_combo_ignore_transient_tbr_errors">combo_ignore_transient_tbr_errors</string>
-    <string name="combo_ignore_transient_tbr_errors">Ignore transient TBR errors</string>
+    <string name="key_combo_experimental_ignore_transient_tbr_errors">combo_ignore_transient_tbr_errors</string>
+    <string name="combo_experimental_ignore_transient_tbr_errors">Ignore transient TBR errors</string>
+    <string name="key_combo_experimental_reject_tbr_changes_below_delta">combo_experimental_reject_tbr_changes_below_delta</string>
+    <string name="combo_experimental_reject_tbr_changes_below_delta">Reject TBR changes below threshold (%)</string>
+    <string name="combo_experimental_reject_tbr_changes_below_delta_summary">Don\'t set a TBR if the difference between the new and a running TBR is below this threshold in percent. Specifying 0 disables this option.</string>
+    <string name="combo_experimental_ignore_transient_tbr_errors_summary">Ignore failures when setting a TBR, unless setting the next TBR also fails.</string>
+    <string name="combo_enable_experimental_split_bolus_summary">Splits boluses into 2 U parts and waits around 45 after each to slow down bolus delivery.</string>
+    <string name="combo_enable_experimental_bolus_summary">Enables the in-development bolus with progress report and cancel option.</string>
+    <string name="combo_enable_experimental_features_summary">Unlocks experimental features which are in development and might be broken entirely.</string>
 </resources>
 
diff --git a/app/src/main/res/xml/pref_combo.xml b/app/src/main/res/xml/pref_combo.xml
index 857281b097..d1d1cd5a6b 100644
--- a/app/src/main/res/xml/pref_combo.xml
+++ b/app/src/main/res/xml/pref_combo.xml
@@ -7,21 +7,36 @@
         <SwitchPreference
             android:defaultValue="false"
             android:key="@string/key_combo_enable_experimental_features"
-            android:title="@string/combo_enable_experimental_features" />
+            android:title="@string/combo_enable_experimental_features"
+            android:summary="@string/combo_enable_experimental_features_summary" />
         <SwitchPreference
             android:dependency="@string/key_combo_enable_experimental_features"
             android:defaultValue="false"
             android:key="@string/key_combo_enable_experimental_bolus"
-            android:title="@string/combo_enable_experimental_bolus" />
+            android:title="@string/combo_enable_experimental_bolus"
+            android:summary="@string/combo_enable_experimental_bolus_summary" />
         <SwitchPreference
             android:dependency="@string/key_combo_enable_experimental_features"
             android:defaultValue="false"
             android:key="@string/key_combo_enable_experimental_split_bolus"
-            android:title="@string/combo_enable_experimental_split_bolus" />
+            android:title="@string/combo_enable_experimental_split_bolus"
+            android:summary="@string/combo_enable_experimental_split_bolus_summary"/>
+
         <SwitchPreference
+            android:dependency="@string/key_combo_enable_experimental_features"
             android:defaultValue="false"
-            android:key="@string/key_combo_ignore_transient_tbr_errors"
-            android:title="@string/combo_ignore_transient_tbr_errors" />
+            android:key="@string/key_combo_experimental_ignore_transient_tbr_errors"
+            android:title="@string/combo_experimental_ignore_transient_tbr_errors"
+            android:summary="@string/combo_experimental_ignore_transient_tbr_errors_summary"/>
+
+        <!-- TODO add validation, to restrict values to rang 0-100, see pref_absorption_oref0.xml -->
+        <EditTextPreference
+            android:dependency="@string/key_combo_enable_experimental_features"
+            android:key="@string/key_combo_experimental_reject_tbr_changes_below_delta"
+            android:title="@string/combo_experimental_reject_tbr_changes_below_delta"
+            android:defaultValue="0"
+            android:numeric="decimal"
+            android:dialogMessage="@string/combo_experimental_reject_tbr_changes_below_delta_summary"/>
 
     </PreferenceCategory>