Regional OCTO video lag

Hi all,
I read there some people encountered issues with lipsync as video lags behind audio.

I have the same situation between 2 bridges at different regions.

Participant from region A
Participant from region B

Region A is JVB + Jicofo
Region B is JVB

The connection between them is about 300Mbps.
Happened mostly on p2p conference.

Did anyone else experience this issue on this configuratio?