Faction doesn't start war after rejected ultimatum

[LaTueur]

The Court faction sent an ultimatum to me, I rejected it, I got notifications about loyalist, but they didn't start a war.
This happened multile times.

[GideonDelta]

This is happening multiple times to me as well. As soon as I reject the faction demand, the war never starts.

Once you reject their demand, it pops up with a message informing the war ended inconclusively because the casus belli is no longer valid.

[NathanNN]

Anyone fixing this bug please????

EDIT: I went into the CK2+ github history and saw the file for faction war Wiz was fixing and downloaded it. It still didn't work. Faction demand leading to war always end inconclusively immediately after Liege (either AI or me) refuse to accept demands.