Related to MC-174356

Steps to reproduce

1. Go to 0 100 0 (in any dimension)
2. Summon an end crystal and name it, or use this command

   /summon end_crystal ~ ~ ~ {CustomNameVisible:1b,CustomName:' {"text":"Custom Name"}'}
   

3. Give it a BeamTarget near by

   /data merge entity @e[type=minecraft:end_crystal,limit=1,sort=nearest] {BeamTarget:{X:5,Y:100,Z:5}}
   

4. The CustomName appears at its BeamTarget coords

Also happens if the summoned end crystal has the BeamTarget included in the command

/summon end_crystal ~ ~ ~ {CustomNameVisible:1b,CustomName:'{"text":"Custom Name"}',BeamTarget:{X:5,Y:100,Z:5}}

2020-09-18 20-18-19.mp4