Buttons Become Unresponsive in Expand Mode/Fullscreen in Pro Gallery on Second Opening

For now, in order to avoid the issue, you need to keep Grayscale toggle disabled and Blur as 1px for Expand mode background, as the issue happens only when blur has a bigger value or Grayscale is toggled on.

Alternatively, although not ideal, it may be better to avoid the Expand Mode or Fullscreen for now.