Photoshop 19.1.2: Still has brush delay

I'm curious what your hardware is where you're seeing the delay (including the GPUs) and how many displays you have running. If you are using multiple displays, is PS running on the primary or secondary display?

A couple of things to try:
1.  Go to Preferences > Performance > Graphics Settings and click the Advanced Settings button. From the drop down options, change it to basic (if that doesn't help, try disabling GPU altogether).
2.  When painting, hide all open panels (by hitting the Tab key)

Do either of the above changes help with overall brush performance?

Thanks,
Adam

I'm on the 2017 iMac, 4.2 Ghz, 64GB RAM, 8GB GPU, main image on the iMac, palettes on the 2nd monitor.
I've been using it on advanced GPU since I've bought it this fall, only recently it seems to be lagging, so it must be a recent PS update. 

Same issue on a Win10 64bit machine, Nvidia Quadro 4000 graphics. I've tried the fixes mentioned here without succcess and hoped 19.1.2 would fix it but was disappointed. Tried them again today, still no joy BUT then I went to the advanced tab and enabled "Use Open CL" and voila - no lag. Then I disabled "Use Open CL" - still no lag. In fact I tried more or less all the combinations of Graphics Processor settings and couldn't provoke the lag. Then I started writing this post, went back to PS to check something and the lag is back and the Open CL trick doesn't work. ARGGHH!

Another data point would be helpful here: does the lag happen as soon as you start working on images in Photoshop or does it get worse over time?

It definitely gets worse over time. I'm going on normal GPU now, it was brushing ok this morning, then got progressively worse. Quitting the program and reopening doesn't help.

I'm not certain. I haven't noticed it progressing but to be honest as soon as it happens CC2018 becomes unusable so I bail out and go back to CC2017 which works fine.

Edward, can you try CC 2017 and see if the lag is present there as well? That would be very helpful to know. Thanks.

I went back to PS CC 2018 v19.0 and so far I do not see a big lag, but not 100% certain. I do not think the lag started that long ago so I don't think going back to CC 2017 is necessary.

Unfortunately after downgrading to v19.0 from v19.1.2 it deleted all of my workspaces and settings. Luckily I was able to restore everything from my boot drive backup.

Has anyone tried the 19.1.3 release? I downgraded to 19.1.1 (from 19.1.2) because of the brush lag bug... I'm curious to update to the latest release, but don't want to go through the hassle of downgrading again (losing my workspaces, brushes, etc.)

I'm back to the sticky cursor bug version 19.1.1 ... ugh.