Hi, only my 2 cents: meridian flip does not happen if Kstars and mount disagree about time/location. Only difference is that when you solve for slew to target, KStars *syncs* your mount to the solved coordinates; at that time, if they disagree abount time (for instance, for different treatment of Daylight Saving, that I saw happen) mount will be confused and think meridian is not where it should be.
Double/triple check time and location settings, and time/location sync between KStars and mount (you have three different options in KStars settings about that).
the log from Sunday to Monday is on INFO level, unfortunately. The meridian flip is initiated at 1:08, but there is no entry that the flip completes. So it remains difficult to explains what happens...
Nevertheless, even if you did it already, please check in the INDI dialog whether your mount has the same location as KStars and is working on the same time. A delay of 0.3h seems too much for me.
Just another idea: maybe your Raspberry or your mount changes time after the initial sync between KStars and the mount happened.
It would be great if you could provide a log on VERBOSE level where the MF fails.
TSA-120 + FSQ-85 + ONTC 10"F4 Newton (+ epsilon-160 on Japan trip) | Avalon Linear + M-zero | ASI 1600mm pro + 6200mm pro | KStars/INDI on Raspberry Pi 4/Intel NUC