Llamas attempt to spit at player from far distances when on a lead

When either a trader or normal llama is attack in survival mode whilst on leaded, they can spit at you from any distance away.

Relates to MC-154053 but is not a duplicate of it. Also relates to MC-215097 & MC-276422.
Testing MC-276422 caused this discovery.

Steps to Reproduce:

1. Find a flat area (or use a superflat world)
2. Spawn either a trader or normal llama
3. Attach a lead to said llama
4. Attach the lead to a fence
5. Attack the llama in survival mode
6. Move away from the llama (e.g. by walking or flying with elytra)
   The llama attempts to spit you from far away

Expected Behavior

The llama should lose aggro when ~10 blocks away similar to when not leaded.