I just tested on GNOME Sid, also cannot access smartphone via MTP:
Mar 17 10:52:41 debian-sid-gnome gvfsd[1241]: error returned by libusb_claim_interface() = -6LIBMTP PANIC: Unable to initialize device
Mar 17 10:52:42 debian-sid-gnome gvfsd[1241]: Device 0 (VID=2a47 and PID=2008) is a bq Krillin (MTP).