Hi, if it works on desktop browser, it should work on mobile browsers too.
Also try using some other actions at your "every 2 second condition" and check if these actions work properly. If not, it might be a Construct 3's bug.
However, I would suggest you to turn on the "Sync" option for Read Actions instead of reading every two seconds.
(Well, you can contact me via Discord as I get notifications when someone messages me there. https://discord.gg/9FG9M224K3 )