The issue is the following. For the Main window toolbar I create an action button for "Toggle auto-view-scroll during playback". The same button with the same action is created for the MIDI-Editor as well. The problem is although it's created for the Main and the MIDI-Editor independently - those buttons are linked in Reaper somehow internally. But what if I don't want it to be linked ? For example, if I would like it to be ON for the Main window but OFF for the MIDI-Editor (e.g. as it's possible in Cubase, I hate this auto-scroll in the MIDI-Editor !).
Because now it's so that if I switch it ON/OFF in the MIDI-Editor, it automatically becomes ON/OFF for the Main window accordingly as well. And if I switch it ON/OFF in the Main window, it's even more strange - it automatically becomes ON/OFF in the MIDI-Editor accordingly as well, but not immediately - it changes the status after I close and reopen the MIDI-Editor next time. It's shown on the gif below. Is there any way to unlink this between Main and MIDI-Editor ?