The lase was on Fitz and from the point the bomb was dropped it was about 1-1.5km away and didn't have a lock on.
The only reason it selected his lase was because the UAV lase didn't pick up so when I pressed R it locked onto Fitz, I hadn't realised I was on another lase as I was focused on free bombing the kuma.
idk why it tracked sideways, especially since it hit dead on and it wasn't locked, but it was hilarious at the time