Second monitor display blanks off when in Grid

I have seen this for the last couple of months, and upgrading to v13.1 still has not fixed it (on Ventura 12.7). Mac Studio M1 Ultra 128GB, dual Apple Studio displays, Library grid on left side (secondary monitor), loupe on right (primary monitor): If I interact with the grid (i.e. click an image, then click the blank grey area where there are no images) it causes the second display to disappear the LR window, showing the desktop. When this happens, the 'second monitor' icon on the primary screen flickers on/off until the LR window re-appears. Screen recording of right screen, display icons, attached. It can occur for a second or two, and is a major hindrance to my workflow.

Anecdotal reports of turning GPU off helps, but that is not a solution for a problem that has been occurring for months (I have robust needs for the GPU). Also, there are technical reasons I have not yet upgraded to Sonoma, and at least one report suggests it doesn't help this particular bug.

This needs to get fixed.