The marked note was input using force duration (otherwise it would register as an 8th connected to two quarter notes). So far so good:
The problem happens when I want to change the tie style to dashed.
I select the tie, go to the properties menu -> “Ties” section ->turn on “Style” and choose “Dashed”:
As you can see, the ties did change into dashed, but the note that had its duration forced to be a dotted quarter no broke back to its original version.
Also because it reverted to its original duration, the newly formed tie between it and the next note has the default style selected and not the dashed style.