Problem(s) Encountered:

Tracking spontaneously shut off during exposure. It is similar to what has been reported on 16th Oct., but it recurred over and over several times.

It did not show any error message, as if it received tracking halt signal.

Tried re-issuing tracking and slewing again to object, which worked for some occasions, while sometimes it just kept recurring. Could not solve it till the morning.

Solutions:

This issue appears to be ongoing and potentially position-dependent.  It has been seen with some consistency around HA -4:50/Dec +53.  Of course when running tests, it worked fine.  Current dynamics look steady and fine when plotted.  Can’t do much else currently but wait to see if failures continue.