I can't say I've ever seen something like this, but I've raised this thread with the development team responsible for Chains.
I think I'm experiencing the same thing:
Your thread has also been raised in that same developer channel. No solution as of yet, but the team is aware of your issue
@seth.madore can you please check whether there has been any progress in identifying the root cause of this annoying issue?
It looks like neither of these threads ever resulted in a Jira ticket (I'm human, things get missed on occasion, and more often than I would prefer...). Could you give me some context as to when these issues arise, anything particular about your workflow (is API involved)?
I (and others) have been trying to replicate this issue, to no avail. I know that you use the API a good deal, is it possible there is something in that workflow that could be contributing?
I also get this! It just happens from double clicking a chain to open its window.
Ok, now we're getting somewhere. I'm on Mac at the moment, I'll give it a try on PC when I get back to the shop this afternoon.
@programming2C78B seems to be right about this one. I wrote a little script to monitor the clipboard and as soon as I clicked a chain to edit it, the script was triggered.
(And no, none of my Fusion API code manipulates geometry selections.)
With this new info, I was able to reproduce the issue and I've logged CAM-58604 to investigate it