check couple BCCH/BSIC in the area. They should be different. It happens that (let’s say) cell A has HO with cell B and sees another cell with the same BCCH/BSIC as cell B (which is different cell) and attempts to make HO. In that case will fail.
As i knew it there is revesion to old channel counter HO_REV10 = reversion during 10 second. In my opinion reversion channel Ho to old lead by :
1. Power issue that could be lead transmission flicker
2. Hardware issue ( DRU, TX and RX ) Trial Lock and Unlock mostly working
3. Reset CF or TG