Illager Bugs from Raids to Behavior

Two issues involing vindicators and pillagers. Both were during two different raids I initiated. The first was that while chasing a villager during a raid, vindicators would sometimes run into bits of water chasing the villager. That was fine except the vindicators would not leave the water once in it. It would not matter how deep it was, they would not swim or float foward. They would only bob up and down in one spot and not pursue anyone or anything. They would not pursue me once I switched it to survival mode. To see more of the glitch I located a pillager outpost. Some of the pillagers were in water not going anywhere at all but just swimming in place staying within the one block surface area. I switched it to survival and they would shoot me with their crossbows but would not chase me if I got out of range. 

The second glitch was in another raid I started. The pillagers came to the village, killed some villagers and then stopped by the central well and they weren't really shooting at the well, but in its general direction. There were no more mobs other them around and they were just shooting at the ground and at random blocks. I was in creative mode. Some would shoot the well sometimes, but it was mostly at just random blocks while huddled by the well. After watching for about two minutes a group of them starting shooting above their heads about three blocks in front of them, all at the same spot. There was no block or target it was just shooting at the air but the arrows stuck in place and would act as if they were trying to fall to the ground but would glitch in animation and just stay floating all in one spot. It was as if they were shooting at an invisible block but I had not placed. 

What I expected to happen was...:
Illagers should swim out of the water like most mobs and chase mobs and the player which they are hostile towards. 

Illagers should continue their raid and find villagers and attack the iron golem.

What actually happened was...:
They stayed in the water and bobbed in place. 

They stopped at a spot in the village by a well and shot at random things and arrows glitched in mid-air. 

Steps to Reproduce:
1. Spawn vindicators and pillagers in water. That is how I recreated it to see it happen again. It might do it with evokers to but I did not think of that until typing this now. 
2. See if they will chase any villagers wandering traders, players, or anything they would be hostile to out of the water.
3. For the arrow glitch it only happened once in one raid. Just try starting raids by giving yourself the bad omen effect with commands to see if they do that during one.