What other browsers and versions were you able to reproduce the 'un-checking box' issue demonstrated in the video? Please also include the OS version for these browsers (as well as the OS version for when you recorded the video). As it is now, I'm not able to reproduce the problem on Firefox 47.0 for OSX.
If you upgraded to the latest Firefox, does this issue still occur?
Stanislav,
What other browsers and versions were you able to reproduce the 'un-checking box' issue demonstrated in the video? Please also include the OS version for these browsers (as well as the OS version for when you recorded the video). As it is now, I'm not able to reproduce the problem on Firefox 47.0 for OSX.
If you upgraded to the latest Firefox, does this issue still occur?