BTT config screen keeps coming to front of iMac when not called for

For some reason, starting perhaps 3-4 weeks ago, the BTT screen intermittently will suddenly pop up as the front screen on my iMac, while in middle of doing other stuff (nothing consistently that leads to this). If anyone has any idea why this might be happening, would be much appreciated! Running current versions of everything (BTT 3.553, OS 11.2.3 Big Sur)