This has happened in several sessions. I have set M57, the Great Wall in Cygnus, and the Cave Nebula in my sequence. The first two are acquired without trouble, but around 2:15 am when the Great Wall finishes SGP tries to go back to M57 instead of going to the next target. The log is here:
The log shows SGP sees M57 as not finished and the end time as having advanced 24 hours, so it goes back to it… The run on M57 did not take all the exposures I had planned before it ran to the end time, but it was long past the end time. SGP 2.3.5.