Couple of little bugs I think?

1
  1. PictureBox right property doesn’t seem to work when left is set to ‘auto’
  2. Signature won’t capture if the control is hidden at design time. eg If I unhide it in my app after being hidden at design time it won’t work. Hiding it in app then unhiding works ok.
2

These both sound like issues which are out of AppStudio’s control - it’s how the underlying browser works. You’ll need to try to work around them.