[playback issue] ritardando not playing correct rate of change

[Vykoiazon]

Describe the bug the rit slows down a little bit but then suddenly drops to the next tempo instead of slowing down by an equal amount every beat to gradually reach the next tempo

To Reproduce

1. make a line of notes starting at a fast tempo
2. add a rit to a slow tempo
3. play and hear it does not slow down by enough and suddenly jumps to the next tempo at the end

Expected behavior it should change by the same amount every beat instead of a sudden drop in tempo at the end

Screenshots

https://user-images.githubusercontent.com/120861729/209750361-3ff5dbe0-afd7-461d-a223-c33434c12218.mp4

Platform information windows

[Vykoiazon]

when watching the tempo number display in the top right of musescore, it usually drops by around 15 per beat but then suddenly drops by a lot when it should be a gradual change by the same amount until reaching the next tempo

https://user-images.githubusercontent.com/120861729/209753878-5be03ae2-b5af-4a53-bb21-d520ac821de1.mp4

[erinic04]

you need to manually set the % to line up with your end tempo