Illustrator file lagging after being open too long
I've recently been encoutering a really frustrating issue where some files I'm working on will start lagging after working on it for about an hour and I will have to quit the program and re-open to fix it. They're not very large files (about 1.2MB) and I already did all the tips I know to make the file small and program run faster including checking the GPU performance settings, unchecking pdf compatible file when saving and updating to latest version of illustrator. The only thing I can think of that would be weird is that I am working with another designer's vector files and they are using Corel Draw which often causes issues (mostly fonts/lines not being connected and stuff like that). Is there any way I can fix the performance or is the file just doomed from using art created in a different software?
