You don't expect the same bug left 7 years unfixed, unless...
Also NEW method of replicating this bug https://cdn.discordapp.com/attachments/773669451010146334/994304942351335494/SVID_20220706_201134_1.mp4
I was able to replicate this error text in Preview 1.19.20.20. It's pretty random but here's a demo video: https://www.youtube.com/watch?v=rbqisXK5e8o
This GameTest pack requires mojang-net to be enabled, which is disabled by realms by default and for whatever reason the pack won't work due to dependency error.
Thanks for the reply. Yes, the issue with pack always uses 0.1.0 is the case for mine as well.
For issue no.3, that issue seemed to be fixed in 1.20.70 previews but not in 1.20.50 currently. So I am expecting a fix for stable builds soon.
And I'm not sure if issue no.1 is work as intended or not.