When capturing flats using the "Wall" mode, any subsequent capture, flat or not, will first slew to the "Wall" coordinates before capturing. The problem is immediately obvious with the message "Mount slewing to wall position", and because of the abnormal additional slew, but because the "Light" frame type disables access to the "Calibration" pop-up window, the situation is confusing. It is not possible to keep the "Wall" mode active and successfully capture a "Light" frame. If the "Wall" mode is disabled, for instance by selecting "Manual" as a flat source, coordinates of the wall source are lost after validating changes in the calibration pop-up.
Additional (really funny) note: the calibration options are part of the sequence file, so any sequence file saved after "Wall" mode is configured will make the Capture module slew to the wall source position. This can quickly become very confusing for the end-user! Besides, when "Wall" mode is used, Scheduler module is not notified with the end of the capture. This cause the scheduler job to remain hung at the wall source position forever.
Will be verified with Capture tests.