If you switch from survival mode to spectator during combat, some ranged hostile mobs will continue to attack you.

Steps to Reproduce:

[Step 1]

Find some sort of ranged mob (Witch, Skeleton, etc., the most consistent way i found to replicate it was with drowned that spawned with a trident) or spawn one in with /summon or using spawn eggs.
[Step 2]

Switch to survival mode and let them aggro you, getting them ready to attack (Drawing back a trident or timing a skeleton's shot/witches potion right)
[Step 3]

Right before they shoot out a projectile, swap to spectator mode using F3 + N. If timed correctly, the mob will continue to attack you (or atleast try) as you are in spectator mode.

Observed Results:

They just keep shooting out whatever they have at you, keeping their arms up in their "ready" position (trident over the shoulder//bow drawn back) without playing any attack animation.

Expected Results:

they probably shouldnt do that

this isnt any major bug or issue, i just felt it should be documented before i forgot about it.

i was able to replicate it fairly consistently with drowned and possibly with skeletons as well, but it was difficult to get any screenshots that properly conveyed what was happening and in the case of the skeletons it was difficult to tell what parts were infighting and what parts were the actual bug