Last night I experienced something that happens occasionally. Some clouds rolled in causing the sequence to abort and recovery to engage. Normally this works well and last night recovery restored the session without trouble once the clouds cleared. However, when it did so, the frames it collected after recovery were significantly off-center. I have watched this happen before and the cause is PHD2. It will struggle to recover a star, and it sometimes finds a bit of noise or something and tried to correct. Before long, it is hopelessly lost and may have moved the scope a good bit. I imaging that I also get some drift if the mount tracks unguided for as much as 90 minutes.
This could be corrected by having a "Center after Recovery" option. So that's my feature request.