Profoto released a firmware today to correct an issue with the B2 used in conjunction with the Fujifilm Air Remote TTL-F that caused freezing. You can read the patch notes below.
What is new in firmware version A8 for B2?
– Normal/Freeze mode bug fix for Air Remote TTL-F (Fujifilm) users.
Download Here (Account Required for Download)
Profoto Air Remote TTL-F: B&H Photo / Adorama
Profoto B2 Off-Camera Flash Head: B&H Photo / Adorama
Profoto B2 250 Air TTL Location Kit: B&H Photo / Adorama