Libre Office documents open but not on top (post upgrade from 42.3)

Libre Office documents, when opened, do not come up, but remain on the task bar with a red underline until clicked. Once opened the red underline is replaced by blue.
I have tried some settings in the Special Window Settings, and a specific rule in the Window Manager, to no effect. All other file types open normally, this seems to be a purely Libre Office problem.
I can find no mention of this online except for Windows 7 some years ago.