Photoshop 2019 and 2020 crashes after I try to add text to an image. When I try to select text. During the selection process the text does not show the style it shows a gibberish text. Photoshop 2018 runs like a champ. Intel i9-7940X CPU @ 3.10GHz. 64 GB Ram. Win 10 Pro version 1903
It sounds like there might be a couple of things going on here. First, let's start with how you're adding text. You're using the Type tool, right? T in the toolbar? Standard (English) layout? Paragraph or Point Text? English strings? When does the crash happen? Does PS give you any error messages first? When you say that the text turns to gibberish, you mean like this? (*#^$(4a_293*28 or something more like this:
Let's start with this and move from there. I'm also available to do a live, web-hosted screenshare if that's easier (but Tuesday, cuz I'm taking Monday off).