Color Picker will not sample outside of Active Document

Photoshop 23.5.5 (I've downgraded from PS2023 until Bridge "New Window" functionality is restored.)
MacOS 13.4

The Adobe Color Picker will not let me sample anything outside of the Active Document. I've got two images open, one has a Solid Color layer (the Active Document), the other is an image in another PS window that I need to sample colors from. Clicking on the color I need in the non-active document does nothing. Sample size is set to 5x5 (none of the sample size options work), sample is set to all layers, and the document I'm trying to sample from is flat, no layers, no masks, not in quickmask mode.  I was able to make it work once by changing the sample size, but that only worked the one time. This is basic functiuonality... what's up?