Android apps not updating on Mikrotik network?

Question

Android

Good day.
We have Mikrotik. Everything is simple on it. 2 bridges wan and lan. Wan pridge has multicast enabled. Configured igmp-proxy.
Lan bridge - nothing is configured, just a bridge.
Configured l2tp client. And accordingly nat.
Basic firewall rules. But even without them, nothing works.
Doesn't update or install apps from Google Play. Hangs at the stage "Waiting for download".
Google Play itself opens and works fine.
What could be?

Answer 1

There are two options:
1. Path MTU Discovery. Then you need to add something like this to the firewall:
/ ip firewall mangle add chain=forward protocol=tcp tcp-flags=syn tcp-mss=1453-65535 action=change-mss new-mss=1360 disabled=no
But I recommend reading like here: https://habr.com/en/post/136871/
2. Ask your top provider to disable GGC (Google Global Cache) on you. It's better to set it up right.
( https://habr.com/en/post/93864/)