I'm not good at describing bugs by all the rules, sorry. In the night builds, I noticed that sometimes Krita does not start the first time. It turned out that the process starts, but freezes in some kind of cycle. Consumes CPU power, but takes up less than 30 MB of RAM. At the same time, I can start more processes with Krita, which will load as expected. But the first process will consume CPU power. I have it about 15-20%. And I also noticed that nightly version takes longer to process "loading resource type" during startup. I tried to delete resourcecache, but I didn't notice any difference. Windows 10 (21h2, 22h2). Only in Krita Nightly. An oldest one I have is from October 3, so i dont know since... Build from October 10 works the same way. Krita is not installed. Only portable from binary-factory.
A week has passed. I remembered about my report. Now I can't repeat this bug in any builds. Maybe it's related to something else. So you can close it.