fdo#80813 - avoid FMR by re-fetch pattern after a potential re-calculation.

Change-Id: Ib197f4cd74cd2c444a5f7c207fe2e5be14eea65d
Reviewed-on: https://gerrit.libreoffice.org/10095
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>