diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/devicesettings/DeviceSpecificSettingsFragment.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/devicesettings/DeviceSpecificSettingsFragment.java
index e3c8e1c84..cd1b81194 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/devicesettings/DeviceSpecificSettingsFragment.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/activities/devicesettings/DeviceSpecificSettingsFragment.java
@@ -1069,7 +1069,7 @@ public class DeviceSpecificSettingsFragment extends PreferenceFragmentCompat imp
             } else if (preference instanceof PreferenceScreen) {
                 // Ignoring
             } else {
-                LOG.warn("Unknown preference class {}, ignoring", preference.getClass());
+                LOG.warn("Unknown preference class {} for {}, ignoring", preference.getClass(), key);
             }
 
             if (getPreferenceKeysWithSummary().contains(key)) {
diff --git a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/zeppos/services/ZeppOsConfigService.java b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/zeppos/services/ZeppOsConfigService.java
index acaf991ee..e0c030517 100644
--- a/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/zeppos/services/ZeppOsConfigService.java
+++ b/app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/devices/huami/zeppos/services/ZeppOsConfigService.java
@@ -1080,7 +1080,7 @@ public class ZeppOsConfigService extends AbstractZeppOsService {
                 if (includesConstraints) {
                     prefs.put(
                             getPrefPossibleValuesKey(configArg.getPrefKey()),
-                            decodeByteValues(possibleValues, decoder)
+                            String.join(",", decodeByteValues(possibleValues, decoder))
                     );
                 }
             }