Formation.js this.offsets is undefined but has no reason

[Silier]

ERROR: JavaScript error: simulation/components/Formation.js line 531 this.offsets is undefined
Formation.prototype.MoveMembersIntoFormation@simulation/components/Formation.js:531:18
Formation.prototype.RemoveMembers@simulation/components/Formation.js:400:7
Formation.prototype.OnGlobalOwnershipChanged@simulation/components/Formation.js:960:8

ERROR: Script message handler OnGlobalOwnershipChanged failed

Strange about this complain is existing if above

if (!this.offsets)
{
  this.offsets = this.ComputeFormationOffsets(active, positions);
  offsetsChanged = true;
}

ComputeFormationOffsets goes like this

...
let newOffsets = [];
...
return newOffsets;

There is no early return inside ComputeFormationOffsets which would return undefined.

There is also no code between those lines which would be able to set this.offsets to undefined

[Silier]

a24 by Yekaterina

[Freagarach]

Pushing back.