Can go through the X/Z 30,000,000 invisible barrier by riding happy ghast

Clones MC-50888?

Steps to reproduce:

1. /tp 29999980 ~ 29999980

2. /summon happy_ghast

3. equip harness and ride

4. /worldborder set 1 (should be in creative mode)

5. Try to fly out the X/Z 30000000 barrier.

Expected result:

You will stop before X/Z 30000000.

Actual result:

You can go through the X/Z 30000000 barrier.