Hi all! ive posted this before but it was a few months back & not sure if anythings changed. So, long story short i have my macbook pro closed displaying on two monitors, works fine! but as soon as i add a third, im unable to save any files. i get no dialogue box anywhere, i can still work, its as if its not even recognizing im trying to save. im running illustrator 26.0.3. i contacted support way back & was told basically "we're aware of the issue but dont have a fix yet other than not using the third monitor" maybe its worth noting im using my ipad as the tertiary display? but i dont have issues when i use my ipad as 1 of 2 displays. only issues when theres 3 displays... Thanks in advance!
Thats a very special case and I doubt that there are a lot of people who are runnin this setup and can give you feedback. So maybe in case you have a thread on Uservoice, I would suggest you ask there.
There have been updates to Illustrator which also have bugfixes, but I'm not sure if your issue has been addressed.