Musesounds triangle and caesura playback incorrect

When I am using the musesounds triangle, it makes no distinction between playing back a long versus short note. The MS basic sound makes the distinction though, not sure why. This started happening right after I downloaded Musescore 4.2. However it does play the muted note correctly if there is an accent over it, which again I'm not sure why.

Another issue that came up as soon as I downloaded the 4.2 update is that caesuras are no longer playing back correctly. They used to stop the whole playback for a few seconds before continuing in the score, like it would be when played live, but they now no longer stop, and it doesn't seem to do anything anymore. I think I saw that some other users were having this issue, but I couldn't find any way to fix it.

I've attached an excerpt of a score I'm working on where both of these issues can be seen.