The word is otherwise unattested, and might also be interpreted as a deviant plural spelling of tapison or even (without accounting for the final s) as a nominal use of the present participle of tapir1.
s.
en tapisance
1in hiding:
(
s.xiv1?; MS: s.xivex
) A qy tant come il demora issi en Engletere en tapeisauns, si troverent a ly totes ses necessaries honestement
13.344
[tapisance] (s.xiv1 (?))