RB1200 packet loss

Hello! Help please.
Two rb1200. Routing between them.
If I do ping from 10.0.0.254 to 192.168.0.253 - ping is excellent, no losses.
If I do ping from 10.0.0.1 to 10.0.0.254 - Ping also excellent.
If I do ping from 10.0.0.1 to 192.168.0.253 - ping is lost to 2-5%, while the pings with large size packets are lost at ~ 20-30%

RB1200 CPU load is not large, about 30-40% of the traffic is about 150 Mbit and 15-20k pps
What could it be? Thank you!
mikrotik1-1024x575.png

what version of RouterOS?
what ports are you using?
what configuration?
are there any queues?

Version 5.11.
10.0.0.254 - Port 7
192.168.0.254 - bonding 3 and 5 port (balance r-r)

Version 5.11.
192.168.0.253 - bonding 3 and 5 port (balance r-r)

Queues do not use.
Only routing.
At 192.168.0.253 raised BGP-routing with my ISP. The provider giving only default route 0.0.0.0 / 0

In the last rb1200 bad ports (9 and 10)
the first port is not working.
In the other rb1200 9 port is not stable.

Concluded that the last rb1200 ports do not work correctly.