System Information:
OS: Windows 10 Pro
OS Version: 10.0.19045
GPU: AMD Radeon RX 5500 XT
CPU: AMD Ryzen 5 3600
Bug Reproduction:
This doesn't happen too frequently, but in my case, making the mask on a color adjustment layer visible, changing the mask feather amount slider caused this bug. Turning off GPU usage for Photoshop had no effect.
Screenshots: