FUSION : Camera Track markers Vanish

There is an inconsistency.
FUSION TAB : CamerTracker1
Symptom : Some actions cause the 'Preview AutoTrack Locations' to vanish.
Work around : Every time you make an FUSION parameter changes -> you have to Disable and then Enable 'Preview AutoTrack Locations'.
Attachments : 1 . 2 . 3 . 4 demonstrate this.
AJ
FUSION TAB : CamerTracker1
Symptom : Some actions cause the 'Preview AutoTrack Locations' to vanish.
Work around : Every time you make an FUSION parameter changes -> you have to Disable and then Enable 'Preview AutoTrack Locations'.
Attachments : 1 . 2 . 3 . 4 demonstrate this.
AJ