Summon mechanic problem with ArmorStand

Summary

When I use summon mechanic to summon a MythicMob, if MythicMob is ArmorStand I get some errors on console and it summons vanilla skeleton instead.

Server version: 1.19.2
MM version: MythicMobsPremium-5.2.0-SNAPSHOT Build 4274

Steps to reproduce

TestMob:
  Type: ArmorStand

TestSkill:
  Skills:
    - summon{type=TestMob} @PIR{r=15}

Then another mob casts TestSkill skill.

Current behavior

It throws error and summon vanilla skeleton which I cant kill because of NPE

Intended correct behavior

It should summon ArmorStand correctly

Server log file

https://pastebin.mozilla.org/0916FxxC

Debug log snippet

https://pastebin.mozilla.org/e5Uov5ca

Proposed fixes

Describe what you think the issue or any potential fixes may be.