bug in GraphWalker Studio 4.3.1: Edges starts disappearing from the model when the Vertex name becomes longer

[Alexander-Ng-Mx]

Observation:
Edges starts disappearing when the size of the name of its vertex grows (see images). If the name is long enough, it can even remove all its edges. It only removes the edges with the source and destination on the same vertex.

starting vertex name

longer vertex name

Expectation:
when the size of the vertex name grows, it should not remove its edges.