rx-too-long and tx-too-long counters increasing

I’ve recently installed a wireless network consisting of four RB/SEXTANT radios and three RB750GL routers installed across three sites. All are running ROS 5.25. The wireless links are working reasonably well, however there appear to be issues on the Ethernet interfaces. The problem lies with rx-too-long and tx-too-long counters increasing rapidly. It happens at all three sites. I’m not showing any errors on the Ethernet and the devices have auto-negotiated 1 Gbps. I do have MPLS and VPLS configured across the system and set my MPLS MTU to 1530 on all routers and switches. The L2MTU for each interface is at least 1598 so this should be fine as best I can tell.

Have any of you run into these rx-too-long and tx-too-long counters increasing before? My searches have been fruitless.

thanks,
Ryan Wilkins