Hello,
I have a macro that surveys me with input windows several times. Prior to Big Sur, that input window stayed in the same location on the screen. In KM 9.1 on Big Sur, each time the input window prompts, it shifts downward on the screen considerably with respect to the previous input prompt's location. I usually drag it to the top manually, when it gets too close to the bottom of the screen, for fear of permanently losing it.