There’s no issue here. Cisco is just showing Ethernet MTU, which is 1500. There are 18 header bytes and 4 dotq bytes (18+4=22 bytes). So, Cisco is allowing 1500+18 (1522) to pass through.
1500 bytes = Ethernet MTU
18 bytes = header bytes
4 bytes = dotq bytes
————————————
1522 bytes