Layers in Illustrator files not working properly when Wacom tablet is connected.

[#1]

I'm not sure exactly what is the cause of a problem I'm having but it seems to have come along with the update to Illustrator 25.0, and I'm wondering if others have it also: in every file that I've created so far in 25.0 layers do not behave properly. Turning visiblity and lock on and off has no effect.  

For example I just now made a new file, drew a default brush line on the default layer 1, then I added a new layer and drew a filled rectangle. And now when I click to turn off visibility of either layer both layers remain visible no matter what. When I save the file and reopen it into Illustrator the layer visibility jumps back to all layers being visible, regardless of which layers I had turned off prior to the save. Quitting the app and restarting my Mac (running OS X 10.15.7 (19H2)) has no help on the situation. 

This would be a fun academic exercize except I'm sitting here with crazy deadlines and a completely unusable Illustrator app with no solution in sight. 

Anybody else having this problem?

{Renamed by MOD}

[#2]

I don't see this issue (Illustrator 25.0 on OS X 10.14.6).

[#3]

When was the last time you rebooted the computer?

[#4]

Thanks all for trying to help! I ended up going onto a support chat with Adobe and they instructed me to manually delete all my preference files (from inside my OS X ~Library and Preference folders) and this did the trick. Still unclear what caused it exactly, and unclear to me why Adobe wouldn't just build a fix like this into the app itself or make it otherwise self-serve (maybe inside the Creative Cloud desktop app which allows me to install and configure my CC apps). But I'm back up and working. 

[#5]

Ok folks well guess what, the solution didn't work after all. After getting back to work the same exact problem happened again, so surely there is a problem of some kind with bad preferences being generated. 

But I did learn one new thing -- the error only seems to happen when I'm using Illustrator 25.0 on my Wacom Cintiq 16 Pro, which means at least I can do my design tasks but I'll need to figure out some kind of new work around for illustration tasks until I can figure out a solution. I'll see if I can learn anything from Wacom Support....

[#6 · Accepted solution]

Hi there,

Sorry to hear about this trouble. I am hopeful that the issue was fixed. If not, I would suggest if you could try steps shared on this page (https://helpx.adobe.com/in/illustrator/kb/illustrator-cc-crash-wacom-drivers.html) and let us know how it goes.

Feel free to let us know if you still need assistance.

Regards,

Srishti