Hello @coilbookmedia,
Thanks for submitting those. I see three of them here. The one about attaching a spline to an Edit Poly seems to have QT (interface of Max) as the source of the problem. I can see that this has been logged and is being investigated. QT is made by a 3rd party and integrated into Max, so these crash reports help to communicate the issue. Thanks for submitting them.
The 2nd issue shows 'msctf' and vcruntime140. I searched the knowledge base and I see and internal only article which mentions that the Creator's update can occasionally corrupt the Max installation and the recommended course of action was to perform a clean reinstall of 3ds Max. Since the crash that you submitted has only 5 other instances ever submitted, I have a good feeling about this one. Please try that for me and thank you.
The last one seems to have to do with the undo stack and Forest Pack. I cannot really tell from this report if it's a Max problem or a Forest Pack problem. Have you tried updating Forest Pack recently? If not, you may consider trying that. I also see Octane in here. Is it possible there is a problem with these two plugins together? As a test can you try to uninstall one of them to see if stability improves? (I realize you need them both, I'm just trying to narrow it down a bit.) I wouldn't do any work here until you've tried the clean reinstall. Thank you.
Best Regards,