AD ldap query fails intermittently

We have configured our access policy to do AD query against our AD and this is working but this just fails intermittently indicating failed to contact ldap server dc=domain.....

when we do ldap query search to ad from command line,it's successful so error MSG is not correct.

The problem gets resolved when we restart apd daemon from command line.we have to apd daemon restart every time this issue occurs.

i have logged this case with f5 support but thinks that there is a bug with apd daemon.it's been escalated to the product development team .

have any of u faced the same issue with ad leap query failing just like that.

is there a fix to the issue?looks like apm is not stable enough like firepass.