Tremolo rendering issues

I'm in the middle of transcribing a piece into MuseScore, and that piece uses some tremolo (about 12 bars of it). Each tremolo spans exactly one measure.

This is all well and good, and I can input the tremolo fine, but MuseScore renders it in a very strange way. The tremolo on the left side of the attached image is a full bar of tremolo, and the right tremolo is a half bar set to "traditional" style - but is how I would expect a full bar of tremolo to be rendered. It would at least be nice to have the option to set the one on the left to "traditional," but there is no style option in the Inspector. The current rendering does not match any tremolo I have ever seen in an actual professionally engraved book of music, and I'd really rather not have to resort to workarounds to get it to look right.