I love this change, but on several sites where I use it personally, and on a hosted site I’m a moderator of (the NaNoWriMo forums) we’ve been seeing some issues. Unlike the regular hamburger menu, if you try to swipe it away it bounces back onto the screen.
I’ve personally seen this on a fully updated Moto (g7) Power on Android 9 and on a fully updated iPhone 8.
There has also been at least one report of the menu opening on touches near the icon and not just on it, but I’ve personally been unable to reproduce that particular behavior.