Ethernet interface speeds on Palo Alto firewalls are reporting incorrect speed. CAPM should be reading the ifHighSpeed OID:
1.3.6.1.2.1.31.1.1.1.15
However, CAPM is reading ifSpeed (1.3.6.1.2.1.2.2.1.5) instead.
DX NetOps CAPM 20.2 or later
In cases where the Interface has a value of 0 for ifHighSpeed (1.3.6.1.2.1.31.1.1.1.15), then CAPM will default to using ifSpeed (1.3.6.1.2.1.2.2.1.5) for the speed of the interface.
Hence, this is working as designed.