l want it to be as accurate as possible, and I don't find manual pressing very accurate. I want it to split when I go in the portal.

I cant say for sure but I don't think many if anyone even uses LiveSplit here, since the game is on Mobile, most people use apps on their phone or just edit a stop watch timer over the video after its recorded.

Or just don't split at all use one timer the whole way through, terribly sorry for the late response these forums haven't been used in awhile and we tend to use discord

And most of us don't edit a timer over we just deal with the splits, as of currently I do not know any solutions to your problem