You can try to remember to go into ‘Format’ mode

(via @CameronDwyer - camerondwyer.com/2018/12/2…)

…or alternatively there are a number of places to vote for a fix:

microsoftteams.uservoice.com/forums/55…

microsoftteams.uservoice.com/forums/55…

microsoftteams.uservoice.com/forums/55…