P: Select and Mask Hangs with Wacom zoom

How do I get the crash log?

Okay thanks Meagan. I tried to repro several times, most closely to your setup with a 2017 MBP with a Cintiq 22HD and a Wacom pen customized like yours. No crash. Would you please include your email in the crash dialog so I can search for it? I'll email you to be sure that I have the correct email address to search our crash logs for this issue. 

I did. The lower button is the scrubby zoom and the top button is the right click

Did you customize the buttons and if so can you please share how yours is configured? Thanks!

One is the pro pen 2 and the other is the regular pen. It happens with both. Neither are the airbrush pen. 

Hi Meagan,  Are you by chance using a Wacom Airbrush Pen?  I'm trying to understand how you are using the pen button to zoom.  Thanks!

I have been able to replicate it on two seperate computers. One is the trashcan style Mac computer, I am not sure which year, running Mojave. With the Wacom Intuos Small. My home computer is a late 2015 iMac running Catalina with the Wacom Intuos Pro Medium. I have not transferred any of the settings between the Wacom tablets but on both I use the bottom button on the pen for the scrubby zoom. I am able to consistently reproduce the crash when using a brush (first noticed in select and mask screen) I make a stroke and while I am making that stroke I accidentally or on purpose tap the scrubby zoom button on the pen and Photoshop will hang. I was able to fix this on my work computer by stepping back to Photoshop 21.0.3 but I have just been being more careful on the home computer and running the latest version. RISKY!! 

Thanks. Our QE was not able to reproduce: I tried with the following but I cannot reproduce the crash. The screen recording of set up, etc, or additional details to consistently reproduce would be helpful:

• Mac Book Pro (2018), 10.14.6 (Mojave), Wacom Intuous 5 touch, 21.1.1 20200312.r.121
• Legacy Compositing on/off
• GPU On/Off
• Zoom using Cmd/Opt-Space-Click, Cmd/Opt-drag right/left (when Scrubby Zoom is on in Zoom Tool), Zoom assigned to touch ring on Tablet and to Pen

Just updated tested and same issue. It has also happened to me when not in the select and mask screen now. It's only when I am using some kind of brush and accidentally touch my zoom button on the pen. This causes Photoshop to hang. I went back to 21.0.3 and did not have the same problem. when I re-map the controls of the wacom I don't have the problem but it effects my workflow so I just have to save often and be very careful of where my hands are when brushing. 

Have you tried installing the 21.1.1 update to see if the problem is fixed?