Zooming in on touchscreen "unlocks" a locked PDF

Hello

I have a pbolem with using a touchscreen monitor.

I have a locked pdf in my whiteboard.

If I zoom in with my fingers (the pdf is under my fingers), as soon as i let it go, the pdf becomes "unlocked"  - I can move it and change the size.

When I tap outside of it, it locks again.

Of course it shows that it is locked the whole time.

Very frustrating

Thanks for any help