On Off automation in Live doesn't work all the time

I’m working with Scaller 2.7 in Ableton Live 11 (under Windows 11) and have a problem with the On/Off automation of Scaller: sometimes in play mode Scaller doesn’t start when the automation goes On. Is there something I’m doing wrong?
Thank you for your support, I really like working with Scaller.
All the best for this new year!