Which is exactly issue with stalebot. 3 months of no movement on an issue is not and should not be a reason to close it. The issue is real and this ensures it wont get fixed.
Issues waiting for far longer then 3 months before they are fixed is super normal of important but not a blocker category of bugs.
I've seen issues ignored for a lot longer than 3 months because maintainers didn't have time, then when they did have time they addressed the issue. Heck, Svelte recently did a PR fixing a bug report from about 4 years back. I'll see if I can dig it up. 3 months is not enough time, in my experience, to decide that the maintainers of an open-source project aren't interested in fixing an issue.
EDIT: I'm not finding the issue that I'm thinking of very quickly. But it was a bug report from 2022 which they looked at at the time, said "yeah, this is an issue we'd like to fix but we don't have a good fix right now", and then the issue was silent. Later on, Svelte went through a major internal rewrite between Svelte 4 and Svelte 5. With Svelte 5's new internals, they were able to fix that 2022 issue. I noticed it because I had just recently read the Svelte changelog, idly clicked on some of the PRs, and noticed an issue with a very low number that was marked as fixed. But I'm not finding it now.
Issues waiting for far longer then 3 months before they are fixed is super normal of important but not a blocker category of bugs.