Curious bug with tied tremolos

NOTE: I am not asking how to fix this. I do not need help fixing this. I am sharing a curious bug I found, with the steps to reproduce it.

This is in regular 4/4. Force Duration is switched off, and so is Insert Mode. Start with three separate tremolo whole notes:

Scherm­afbeelding 2023-12-06 om 21.10.45

Tie them together:

Scherm­afbeelding 2023-12-06 om 21.10.58

Now, the total duration of this note is a dotted breve. Select it, hit . to make it undotted. The result is this:

Scherm­afbeelding 2023-12-06 om 21.11.10

Similar behaviour occurs with shorter note values, and with different tremolo values.

Scherm­afbeelding 2023-12-06 om 21.32.45

Oddly enough, when starting to add notes to the situation above, this happens:

Scherm­afbeelding 2023-12-06 om 21.34.26

When the notes are tied together before the tremolo is added, everything behaves as expected.

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