When I use "call JsonTextDecodeWithDictionaries", this app works well on both iOS and Android.
Is this a bug in the Android version, or the current specification of App Inventor?
In Android, the underlying value is not returned as an AI2 list when you get the value from a key, this needs to be decoded back to a list. GetEntries is returned as a dictionary.
Do you have an actual example of this? As you can see in your image the value in the bubble for GetEntries shows the native JSON list, not a stringified copy.
Note that App Inventor auto-coerces values between types in method calls, so the fact that you pass the result of get value for key (which should be a list in this case) into JsonTextDecode causes the list value returned by the get block into a string so that it can be parsed back into a list.
Hmm. I'll have to take a look then. That should be a list (and looks like a list), so I have a feeling something bad is going on in some of the JSON handling code...