How to catch log messages in build

Hello everybody,

I'm working on a game/simulation that teaches people how to make games in Unity. For that I parse log messages to help the player understand the console.

Following code is used to catch all log messages:

Code (CSharp):

1. void OnEnable() => Application.logMessageReceived += LogCallback;
2. LogCallback(string condition, string stackTrace, LogType type) => DoStuff();

In the editor everything works fine but in different builds I encounter following problems:

Non-Development Build + ScriptOnly Stacktrace in PlayerSettings:
No Log messages at all (besides exceptions).

Non-Development Build + Full Stacktrace in PlayerSettings:
All log messages but the stacktrace is not understandable for beginners.

Development Build + ScriptOnly Stacktrace in PlayerSettings:
All log messages like in the editor (desired goal) BUT Development Build watermark in the corner.

Now following question: is there a possibility to
1. remove the watermark in a development build somehow or
2. catch the same log messages in a normal build like working in the editor?

To code my own log-writer is not really an option because the player is working with a runtime-C#-compiler and can basically code everything like he was in the Unity Editor.

Thanks in advance!