This is assuredly corruption of one sort or another.
First question has to be, given the statement "It crashes on both Access 2010 and 2016 as well as multiple pc's," is the database split, with the Back End (with Tables) on a shared drive and a copy of the Front End (with everything else) on each PC?
You've apparently deleted/recreated the Combobox...but sis you leave the original code in place or did you delete it then recreate it, as well? IF not, I'd try that.
Last resort, I think, given what you've already tried, is just what you've said...recreate the entire Form.
Good luck!
Linq ;0)>
The problem with making anything foolproof...is that fools are so darn ingenious!
All posts/responses based on Access 2003/2007