Packet capturing iPhone 5 from Mac

I have connected iPhone 5 to mac and got remote virtual interface defined.
In wireshark I have set the DLT_USER settings for user 2 (149) to 'eth' and header size 108 (running on wifi).

When capturing data however the info column says "Unknown Frame (Bogus Fragment)".

When trying on a different mac at a different location this setup works correctly.
What am I missing?