Just received my V1 from repair/upgrade. I sent it in due to the x band alerting when it was disabled. It happened enough times to warrant a repair in my opinion. It came back with version 3.863 and it is too early to tell about the x band alerts but it picked up 3 bogeys on I10 near my home at a distance of 2 miles and that was with 2 overpasses between me and the LEOS, so the Ka is working great. The V1 will really get a workout as a drive to Indiana and back is scheduled next week-- it's vacation time before the kid goes back to school.
I have 3.863 with X-band disabled and have never received a X-band alert. I wish you the same luck.