Argh! Unfortunately that's not new. Sounds like this isn't fixed (I haven't had the chance to test much and it hadn't happened when I did, so the bug got auto-closed):

bugs.kde.org/show_bug.cgi?id=410094

Can you try the branch own-goto from here: github.com/james-lan/indi/tree/own-goto ? Amusingly, I was working on that for checksum based stuff, and remembered that. That particular branch is the current version with that one change (plus version bump) so it doesn't have the checksum stuff yet.

For a mitigation, increase the polling time. That won't prevent it, and it's annoying, but will reduce the chance of it occurring.

Basically, When I looked at (Kstars has had some changes) It boiled down to a lack of a timer in Kstars, plus the driver relying on the lx200 functions, which set the switch to Slewing, even if the mount isn't yet, and when the status update comes which also sets the TrackState. Under bad combinations of timing: Move Issued and sent - Status update before OnStep changes state, OnStep reports Tracking, driver updates TrackState to Tracking - Kstars goes: Done! Start picture - next update, OnStep reports Slewing, driver updates to slewing, but the image is in progress.

On the other hand we could announce it as a new driver feature: Fastest way to do star trails. ;)

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