yeah its subtle, but its a 100% repro for me. I'll attach a video demonstrating the issue. In it you can see that every time I swipe to select a brush with the quick menu(its a favorite preset brush), it leaves a little mark where my finger stopped swiping. you can also see that after I make a selection with the lasso tool, if I swipe to select a different tool and then the lasso again, it registers a tap of the lasso when I let go and deselects.
This is on an ipad mini in the latest beta.