The Android stock browser is horribly broken and generally very hard to fix issues with. For this type of issue it's very risky to try and fix it, since if we kick off the game loop again using some workaround and that workaround is accidentally applied to any other platforms, then we kick off the game loop twice which will break lots of other games.
Some vendors make modifications to the stock browser, so it may be just that for example Samsung devices exhibit the problem, which could enormously reduce the number of affected users. I've not heard of this issue before either, even though it sounds quite obvious, so I'd suspect this is the case and just one vendor's phones are affected, possibly even just one model.
I'd suggest just telling Android users to use Chrome for Android. Not only is it far more reliable with fewer bugs, but it's much faster too.