Key Change Issue

Hi, I'm transcribing Paganini's Caprice No. 1 for the cello, and I've attached screenshots of two instances of the same problem I've ran into. I know that the standard convention of notating a key change is to place a natural in the key signature of the first instance of the key change where it applies.
In my case, the first key signature is F#, and I would like the second to be notated as F♮B♭E♭, but Musescore notates it as just B♭E♭by default.
Likewise, when it changes back to F#, I would like it to be notated as B♮E♮F#.
Any workaround to fix this would be greatly appreciated.