Trackpad Scrolling on the right edge is not possible? (Bluetooth Magic Trackpad)

Hello,

since a while I am recogniszing that I cannot scroll with my two fingers on the right side of the very edge of my magic trackpad 2, when BTT is activated. However when BTT is deactivated i can scroll on the very edge right side of my trackpad. This behaviour only occurs on my Bluettoh Magic trackpad and not on my Macbook Pros trackpad. This does not bother me and I am fine with the function, however I want to know why it works like this? Did I enable this somewhere or is there a possibly to turn this off? I would like to get to know BTT a bit better. Thank you if you could clarify on this!

Thank you