Floating No-AI Issue - Block Disguise

When I spawn a mob with a block disguise and no-ai it soars up into the air disapears and appears on the ground and does this over and over again. This is only happening when Disguise type: block is used.
Is there any way to fix this issue?

git-Spigot-93e20b3-f8500c0 (MC: 1.12.2)
MythicMobs-4.3.0-SNAPSHOT.jar
LibsDisguises-9.5.0.jar

Block:
Type: spider
Display: '[Block]'
Health: 50
DamageModifiers:
- FIRE 0
- FIRE_TICK 0
- LAVA 0
- WATER 0
Options:
NoAI: true...

Floating No-AI Issue - Block Disguise