My "To Coda" does not want to jump to the Coda

I notice that if I turn off "Play repeats" in coda properties, then the jump works. Playback skips the third ending, however. This might be a limitation of the coda function. I wouldn't claim to know how the system works, but maybe a DS inside a repeat is the culprit. I don't know a way around it. I'm just reporting an observation.

You can describe how you personally might interpret that, but according to the standard rules of notation, this is undefined. And I can pretty much guarantee that means you'll get kind of random results in real life. If you want musicians and MuseScore to play what you intend, you'll meed to rewrite this into a more standard form.

Read in the manual for Musescore 3 :

Jumps and voltas
One important thing to keep in mind is that jump labels should not be under a volta. There are some exceptions to this, but jumps under voltas are not normal notation and should be avoided. Also, if a segno, “Fine,” or “To coda,” is under a 2nd Volta that will never be reached, the D.C./D.S. will be ignored. The best rule is to use duplicate measures (for example an identical measure under the 1st volta and in the coda section) where necessary to avoid putting jumps under voltas.

On the subject of Jumps and voltas. Voltas require repeat barlines to indicate playback count so the volta know which repeat is being played. Even though a D.C. or D.S. causes a measure to be played multiple times, this count is not taken into consideration for voltas. A volta in the middle of a jump section with no repeat will not playback properly. It will always be ignored (the music under it will always be played) or it will always be skipped (the music under it will never be played) depending on the volta's playback settings.