Not sure if its an issue of horizon but that's the camera am using.
I use sequencer capture (LRGB filters) with Artemis for 2 hours (last version downloaded 3 days ago; 4.7.0.0). Then i change object. I take continuous pics (loop) to do my adjustments using markers. Switch back to sequencer capture, start, then wait for the first pic to be displayed; but then the software will always replace the last loop picture for all new picture of the sequencer. I checked the pictures taken using MAXIM, they are really replaced with the last loop 2s pic. To solve the pb , reboot, restart Artemis. Happened to me twice in 2 days.