Possible explanation for "obfs4" bridges' blocking on Russian mobile networks.

Hello, as earlier reported on the Tor Project gitlab page in the 2024 censorship page, a user reported of obfs4 bridges being blocked on 4G, and working on 3G. I conducted a test, and obfs4 bridges seem to get stuck at some point, on both 4G and 3G, so either the whole ip is blocked, or the protocol. I also wanted to add that ping tests/small packets of data pass through, in my tests, from Russia. So even blocked IP's return a ms ping result. In my experience with obfs4 bridges, they usually get blocked first/more obfs4 bridges are blocked on mobile networks than a regular cable home connection.