Replicas after maxscale binlog don't get updates

I got next critical issue with maxcale binlogrouter and It repeated twice already

I have the schema:
masters ( 2 hosts ) --> maxscale binlog --> replicas (few hosts)

When I do switchover master to other host that cause problem that replicas after binlogrouter stop getting new updates . Replication process Slave_IO & Slave_SQL are active on these replicas and replicas lools like alive , but Gtid_IO_Pos not changing .
Only restart of replica (stop slave ; start slave ; ) helps to continue replication.

On maxscale binllog all looks fine . It's getting update from new master , Slave_IO & Slave_SQL are active and Gtid_IO_Pos position increases

I've attached log from maxscale binlog and few replicas