first of all, you seemed to have disabled waves autostart in the settings menu

second of all could be the capture method you are using makes the game thinks that one of your finger is still touching the pad on screen

Three-finger screenshot doesn't work well with this game engine or it is a OS-specific issue, clean Android doesn't suffer from that and I can't reproduce the issue.

Auto wave calls work as intended - button will be auto-tapped as soon as you kill the last enemy on map. You can switch to old style auto wave calls in settings