IP Error on FortiGate 200B

Hi all,

I'm seeing an error reported on the WAN interface of my 200B. I can't find documentation about this anywhere. Has anyone seen this before?

 This interface is experiencing extreme packet loss (40-70%), and I'm wondering if this error means anything related to that.

The offending lines below are

MAC0 Rx Errors: 5

and

MAC0 IP Error: 1

FG200B<removed> # get hardware nic port13
Driver Name: NP2
Version: 0.92
Chip Revision: 2
BoardSN: ���8FModule Name: 200B-256
DDR Size: 256 MB
Bootstrap ID: 18
PCIX-64bit-@133MHz bus: 02:00.0
Admin: up, num=3, duration=9610251
Current_HWaddr: <removed>
Permanent_HWaddr: <removed>
Link: up, 3
Speed: 1000Mbps
Duplex: Full
Rx Pkts: 667685392
Tx Pkts: 1676836948
Rx Bytes: 3674728448
Tx Bytes: 1143791616
MAC0 Rx Errors: 5
MAC0 Rx Dropped: 0
MAC0 Tx Dropped: 0
MAC0 FIFO Overflow: 0
MAC0 IP Error: 1

TAE Entry Used: 0
TSE Entry Used: 0
Host Dropped: 0
Shaper Dropped: 60
EEI0 Dropped: 0
EEI1 Dropped: 0
EEI2 Dropped: 0
EEI3 Dropped: 0
IPSEC QFIFO Dropped: 0
IPSEC DFIFO Dropped: 0
PBA: 123/1019/251
Forwarding Entry Used: 0
Offload IPSEC Antireplay ENC Status: Disable
Offload IPSEC Antireplay DEC Status: Enable
Offload Host IPSEC Traffic: Disable
ses mask: 40027dcb

and here's the system config

Version: FortiGate-200B v5.2.6,build0711,160129 (GA)
Virus-DB: 16.00560(2012-10-19 08:31)
Extended DB: 1.00000(2012-10-17 15:46)
IPS-DB: 5.00555(2014-10-07 01:21)
IPS-ETDB: 0.00000(2001-01-01 00:00)
Serial-Number: FG200B<removed>
Botnet DB: 1.00000(2012-05-28 22:51)
BIOS version: 04000008
Log hard disk: Not available
Internal Switch mode: switch
Hostname: FG200B<removed>
Operation Mode: NAT
Current virtual domain: root
Max number of virtual domains: 10
Virtual domains status: 1 in NAT mode, 0 in TP mode
Virtual domain configuration: disable
FIPS-CC mode: disable
Current HA mode: standalone
Branch point: 711
Release Version Information: GA
System time: Thu Aug 29 11:36:10 2019