Looks like you had a side lobe lock on. So your state vector has drifted.Here in a scenario
If it is a bad state vector, is that fixable?
In a nutshell what you need to do is manually slew the RR until you max out the signal strength, then switch to auto track and verify lockon, then switch to LGC and PRO through the DSKY and you will get a few 06 49's telling you its adjusting the SV.