When I heard about the latest snapshot, I decided to install it and test its new features, specifically the /ride command.

What I expected to happen was...:
I expected the enderman to be angry, but I expected him to teleport at the standard frequency that is when the player looks at the enderman (and it should be).

What actually happened was...:
When I started riding the enderman with the /ride command, the enderman began to teleport rapidly and with very high frequency (much higher than usually), causing frame rate instability, and, less often, lags (on the rendering configuration set to >7 chunks).  This may make this snapshot unplayable on weak-hardware devices.

The described situation is visible in 2 videos: 1 Attached (short) and 1 available at the link: https://www.youtube.com/watch?v=O8T7k-V9hVQ (Full reproduction)

Steps to Reproduce:
1. Create a world in 23w03a snapshot (It is important to set Allow Cheats to On)
2. On creative summon an enderman (using a spawn egg or command)
3. Use command: /ride (player nick) mount (Enderman ID)

4. Change gamemode to survival.