IOS won't transpose before key change if first key is C major

I am using IOS Musescore 2.5.16

A song that changes key does not transpose correctly on IOS if the first key in the song is C Major. After the key change, transposition is correct. Before the key change, both notes and chords are unchanged. Changing the song to a different key(s) seem to work around the problem.

An example of the error is at https://musescore.com/user/498481/scores/6183409

A similar example where the first key is NOT C major works correctly: https://musescore.com/user/498481/scores/6183380