Enabling gestures to work along with the S Pen

[OverSavior]

Hello! Recently picked up an S6 Lite as a base for sketching. I'm not sure if it's an app issue or the tablet, but it seem to be happening in every app I try. Currently I use Infinite Painter, and there to Undo you can simply tap with two fingers or click the undo button. However, none of these features work if I have my S Pen hovering above the screen, as if it was locking all gestures. Is there a way for me to disable this? When doing lineart on PC I can just draw a line, hit Ctrl+Z, and draw another one instantly, but on the tablet I need to lift the S Pen first, then undo, then place my hand back on the screen and only then draw, which is really uncomfortable. Thank you in advance.