Raids sometimes continue if all villagers are dead

If a raid wave spawns, the raid will sometimes continue, even if all the villagers die. This didn't happen in 1.15.2.

To reproduce, use the seed -5729700265941998189 and run the following command to go to a village:

/tp @p -1996 69 556

Then affect yourself with bad omen. When the raid wave spawns, kill all the villagers (using /kill @e[type=villager], just to make sure), and notice that the raid continues.