Odd problem with HW v3.1 and wifi module
 

Just got a HW wifi-module (2nd hand) and have been testing it with a couple of ESCs.
On my v2.1 everything run smoothly.
But when I connect my v3.1 it keeps giving me data reading errors when I edit parameters. If I change something in between the error messages and save, the change goes through (double checked with USB link).

Any ideas?