Network packet corruption in emulated VLAN on mac

[udf2457]

When running a native (QEMU 9.1 ARM Virtual Machine (virt-9.1)) Debian 12 (bookworm) guest in UTM 4.6.5 (latest Apple App Store version) on MacOS Sequoia 15.5 (Apple Silicon M2) using UTM Emulated VLAN with no special settings (defaults, no advanced options or port forwarding), I see the below when running a simple ping.

I can confirm this also happens on Fedora 42-1.1.aarch64, so it is not a Debian thing.

This does not happen in another network mode, e.g bridged.

PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=0 ttl=255 time=0.000 ms
wrong data byte #16 should be 0x10 but was 0x2
#16	2 4d 0 1 e8 9b 7b 68 0 0 0 0 dc 56 9 0 0 0 0 0 10 11 12 13 14 15 16 17 18 19 1a 1b 
#48	1c 1d 1e 1f 20 21 22 23 
64 bytes from 8.8.8.8: icmp_seq=0 ttl=255 time=0.000 ms (DUP!)
wrong data byte #16 should be 0x10 but was 0x2
#16	2 4d 0 2 e9 9b 7b 68 0 0 0 0 21 63 9 0 0 0 0 0 10 11 12 13 14 15 16 17 18 19 1a 1b 
#48	1c 1d 1e 1f 20 21 22 23 
64 bytes from 8.8.8.8: icmp_seq=0 ttl=255 time=970507456999095 ms (DUP!)
wrong data byte #16 should be 0x10 but was 0x2
#16	2 4d 0 3 ea 9b 7b 68 0 0 0 0 db 72 9 0 0 0 0 0 10 11 12 13 14 15 16 17 18 19 1a 1b 
#48	1c 1d 1e 1f 20 21 22 23