3.20 crashes in changing upper lower case

I already noticed . Once i try to use case conversion it crashes . In the first time the program put a dialog message to notice that it already sent a message to the developee. It happnmed many times after.
I just made some formatting in my mp3 material

For this time i reverted back to 3.19 until the problem will be solved

It doesn't automatically send a message to me, you'd need to share that with me in order to get it reproduced and eventually fixed.