Ever since "upgrading" to Logi Options+ I have experienced very poor performance of the "Flow" functionality of my M720 Triathlon mouse and K850 flow-compatible keyboard.
It doesn't matter whether I selected "Move cursor to edge" or "Hold CTRL and move cursor to to edge" to Switch computers - it often doesn't work, or only the Mouse flows and the keyboard doesn't switch.

Until recently I have loved the Logitech flow functionality - but now it is causing multiple errors in my work - having moved mouse from one computer to the other, but then finding I am typing in the other device because keyboard hasn't synced with mouse flow.

Very frustrating :-(