Scaling collections with vector masks - strange behaviour

[Corniger]

https://youtu.be/2vCcYAjKN1U

It constantly happened during the last months, so I felt like I had to say something.
This one was quite "mellow".  I could see what I was doing. Often, I can't even see what's going on since the vector mask gone crazy is covering up what I actually want to transform. It seems like the moment you transform the group contents, even just move or slightly rotate etc., the mask gets scaled up approx. 3-fold and moves with the transform.

This is a huge problem, for example, when I define a midpoint, then have to zoom out, zoom in again so I can see the transforming handle on top, then rotate by just a hair, like 0,1 degrees and the mask covers what I need to see. 

Well visible on attached screenshots, too.

The lag is because the group contains a number of high res layers.

Win 10, 26.5.0 and previous releases; 128 GB RAM, Quadro M5000, Dual Xeon setup of some sort.

[Corniger]

It seems like the mask (preview) gets stuck at zoom level. So if you zoom in, then transform and zoom out, you'll get this behaviour

[c.pfaffenbichler]

Does turning off »Use Graphics Processor« in the Performance Preferences (Photoshop > Preferences > Performance > Graphic Processor Settings) and restarting Photoshop have any bearing on the issue? 
https://helpx.adobe.com/photoshop/kb/troubleshoot-gpu-graphics-card.html

I cannot reproduce the issue, could you please provide the file (feel free to delete all Layers except the affected Group)? 

[Corniger]

No, deactivating the GPU doesn't change a thing except slowing down the processing speed.

I'm sharing a "safe" version here - tested it, since I flattened all the groups I wasn't sure if the layer groups maybe were the issue.

Thanks for the help!

[c.pfaffenbichler]

I can reproduce. 

As an interim work-around I would recommend grouping the Group and moving the (pixel) Layer Mask to that Group. 

[Corniger]

Should I post this in the bugs section? I have very specific reasons for using the vector masks - of course I could always recreate a pixel mask from the vector, but I'd rather avoid that if possivle.

[c.pfaffenbichler]

The thread is already marked »Bugs«, so some Adobe personnel should be aware. 

By all means, keep the Vector Mask, just apply it to an additional Group different from the Group with the pixel Layer Mask (Group in Group) if the issue arises. 

If I remove the Layer Mask the Vector Mask »behaves«. 

[c.pfaffenbichler]

The problem appears to be connected to the »Reveal All« Layer Mask. 

Adding a black element in it results in the Vector Mask behaving almost as expected while transforming. 

[Corniger]

OK, I just reproduced this, seems to work for now - putting a small dot on the mask holds it somewhat together. At least that's better than before. Thank you for your efforts so far @c.pfaffenbichler !

[c.pfaffenbichler]

I hope some Adobe employee will chime in …