Why does a Graph sometimes look mixed up and sometimes it's normal again?

[l3ifk]

Sometimes when opening the Graph UI in the Web UI the Graph looks like this:

Other times it's with enough space between each node and in general more tidy so you can see each edge and node.
I create the Graphs with Python like this:

class FullGraph(Graph):
        _edgeDefinitions = [EdgeDefinition('New', ['Saga', 'Epic'], ['Epic', 'Story', 'Task', 'Defect', 'Sub_task']),
                            EdgeDefinition('Open', ['Saga', 'Epic'], ['Epic', 'Story', 'Task', 'Defect', 'Sub_task']),
                            EdgeDefinition('In_Progress', ['Saga', 'Epic'], ['Epic', 'Story', 'Task', 'Defect', 'Sub_task']),
                            EdgeDefinition('In_Specification', ['Saga', 'Epic'], ['Epic', 'Story', 'Task', 'Defect', 'Sub_task']),
                            EdgeDefinition('Resolved', ['Saga', 'Epic'], ['Epic', 'Story', 'Task', 'Defect', 'Sub_task']),
                            EdgeDefinition('Closed', ['Saga', 'Epic'], ['Epic', 'Story', 'Task', 'Defect', 'Sub_task'])]
        _orphanedCollections = []
 full_graph = issue_database.createGraph(name="FullGraph", createCollections=False, replicationFactor=3)

After editing something in the Graph Settings like the Depth for example and applying to Reload the Graph, it goes back to normal and stays that way until it, seemingly, random breaks again.
Thanks in advance!