Open a html modal from Babylon and got stuck on mobile device sometimes

@Dshah_H I don’t know if your issue is the same as this one. Can you set up a repro?

Tested on Safari and Chrome browser on iOS and can’t repro this issue anymore with BJS v5.0.0-alpha.20, thanks for the quick fix!

I am not able to repro this behaviour in PG

I will investigate further if the issue is coming from somewhere else. Thanks