I logged debug info for the iOptronV3 driver and this is the error. I am not sure how to debug multiple INDI drivers at the same time, as I am not sure what happens first, the ASI CCD failing to expose, or the CEM40 not returning to the command. I will debug the ASI driver next.
The only part that is weird is this : [2022-09-07T22:03:01.182 PDT DEBG ][ org.kde.kstars.indi] - iOptronV3 : "[DEBUG] CMD <:ZE00080#> "
The driver has this as a guide command, but I can't find it in the RS-232 command set, that instead appears to be expecting motion commands to be prefixed with :M