Trill lines avoid ties by too much
See discussion at https://musescore.org/en/node/278899
As indicated in the above discussion, trill lines avoid ties by too much.
In the above picture it seems the bottom of the tr is avoiding the tie, when all that is necessary is for the actual line to avoid the tie. This would move the trill line down about 1 space and make it look better. If you enter these notes without the tie you will see that the move is significant.
This issue should be considered along with #278912: Style not passed to trill lines