As I move my mouse around, UI elements underneath my mouse cause all this gibberish to flicker, and if I resize the window small enough, I can get part of the gibberish to go away:
I’ve only been able to reproduce the problem once since my original post—just this morning—which is odd because I couldn’t really use Postman the day I installed it. At any rate, I’ve now disabled hardware acceleration. I’ll post an update in another week or two.
Just like you, I was also facing the same problem. However, now I have detected that I mistakenly downloaded the previous version of Postman. Now things are way better as I expected.