Some recordings i get are only 1 side of the channel ASTERISK 16.10.0

some recording of calls i get is 1 sided only
The funny thing is in the middle of the same recording it suddenly started to record both sides .
where can i check this ?
asterisk 16.10 real-time

don’t see anything different in the logs

Which recording application are you using?

mix-monitor application

also confirm asterisk 13.33.0 is ok i do not have the problem

opus from source installation on centos 6
after i removed it works ok