Currenlty the CTR countdown is reset on a diplo change between players who are allies of the player with the lowest playerID who is mutually allied to all owners of a relic. (Excuses for the too long sentence.) Also all those allies win, even if the allies are enemies of eachother.
Thus enemies of eachother can win together. imo that shouldn't happen thus all the relicOwners should be mutually ally to start a timer. And only everyone who is mutually ally to all relicOwners will win when the timer runs out. Ofc in between those there can be players enemy of eachother, but now at least the players who actually make the victory decide who win, not a lucky player who is allied to all relicOwners and has the lowest playerID.
For keeping this symmetrical when diplo changes, the timer is reset on all occations the group of winning players changes (thus all the relicOwners + all player mutually allied to all relicOwners).
To keep symmetry on player defeat reset the wonder counter