PJ
The stick shaker remained active throughout the flight.
It stands to reason that the maintenance crew won't go out and trouble shoot a problem that is not brought to their attention. Your point on "where's the write up?" will hopefully get answered in due course. It has me puzzled, given the detail provided in the A-SHOR report cited on page 21. (this refers to the previous flight)
PIC advised the controller that the altitude of the aircraft could not be determined due to all aircraft instruments indicating different altitudes and requested to the controller to block altitude 3,000 feet above and below for traffic avoidance.
One thing I found interesting on the timeline was what might have been some trouble shooting by the cockpit crew with the flaps, but that particular report points me toward a compound malfunction; you've got one problem making the pitch control a problem, and another problem presenting both pilots with confusing altitude information. (though if all that meant was "an ALT disagree alert" this might be a red herring).