Deleting a record triggers a Qt warning
"QSortFilterProxyModel: inconsistent changes reported by source model"
Fairly sure that this did not happened with the original implementation. Doing a bisect might be a good way to get started on this issue.
(RM-2731 from redmine: created on 2015-06-27 by Marc Zinnschlag, , closed on 2015-07-24 by Stanislav Bas)
Edited by redmine