Near all my RB532 show ethernet tx/rx drops

Near all my RB532 show ethernet tx/rx drops.
This happens in very different sites. In the same sites, RB411AH, RB333 works fine.
I use 3.30.
There is some things to do ?

Thanks

Rodolfo

Try put RouterOS 2.9.51 on all RB532

it is a known (and never resolved) problem of rb500 ethernet drivers.
the solution was to enable “connection tracking”.