Hi @scott_j_swaaley , thanks for asking.
Yes, you are right, the crash is one time issue and can be prevent by not touching some key points. I've reported it to our development team.
For the second relocated floating panel issue, I think it's annoy too when it often covers your canvas and need to be moved away every time. Docking this kind of temporary panel can fix it in a certain place, but as @jorge_garcia said, it's not a good solution as it will make the panel opening & closing unexpectedly.
So my suggestion is, how about collapse your panels on the left/right to make your canvas bigger, then this temporary panel won't cover too much of you designs when it's keep in right. If you want to use/check the info of a collapsed panel, you can simply move your mouse onto it or expand them once you need.
Please note, as the collapsing panel is only enabled for stack panels so far, you probably need to "convert to stack"(from 3-dot menu of panel) first and then collapse the panels.
This kind of docking panel is a new feature of our last update. Although there are several issues and the using experiences also need to be improved, we will keep fixing the issues and improving the using experiences in future updates to make it easy to use. And we really appreciate your suggestions and feedbacks over it. Thanks!
Regards,
Sally

Sally Yang
Software QA Engineer
Fusion 360 Quality Assurance Team
Autodesk, Inc.