I don’t usually comment on beta stuff in the forum. Beta bugs are transient and get fixed in days or weeks, but forum posts last for years in google search hits – and these posts end up confusing a lot of future users looking for solutions.
I do however chat on Slack about beta stuff. Slack chats don’t show up in google searches – so it’s perfect for talking about stuff that’s probably going to change in a few weeks.
My Slack channel is public and free. Feel free to drop in and say hi:
Sign up: http://slack.yourhead.com
Sign in: https://yourhead.slack.com
As Big Sur gets closer to release date (usually this comes in late Oct or Nov – but it varies a lot) I’ll make sure Stacks is ready. Getting things compiled native for “Apple Silicon” may take a bit longer – but I’m working on that too.
Until then I’d encourage you to submit bug reports either with Apple’s Feedback Assistant (if it looks like an Apple bug) or to the Stacks public bug tracker: https://gitlab.com/yourhead/stacks/-/issues