[Solved] message was cropped and render un-usable, sometimes, for chinese fonts.

You could try looking at the Gadgetbridge log to see if any errors were reported by Bangle.js when the screen got displayed like that?

If it's reproducible you could ensure that in the Android app settings on Bangle.js Keep Msgs is set, then you can disconnect from Gadgetbridge, connect with the Web IDE and see if anything gets reported to the console when you try and view the message