Throwing ender pearl whilst mounted doesn't teleport you

The bug

When you throw an ender pearl while you mount a mob, you are dismounted from the mob and are not teleported by the ender pearl.

How to reproduce

1. Mount any mountable mob
2. Throw an ender pearl

Example

Here is an example in video: Minecraft 20w20a - Singleplayer 2020-05-13 17-02-18.mp4

Note: It works correctly in 1.15.2