Error when moving a Lane element

When I try to move a Lane element an error in thrown (“Cannot read property ‘source’ of undefined”).

How to reproduce:
-Open the online demo
-Create a new Pool/Participant element
-Add a Lane to the created Pool/Participant element.
-Select a Lane and try to move it with the mouse
-Nothing happens on the diagram itself but in the Console an error is shown

Thanks for the report.

I was able to reproduce the bug and created this issue to track it.

Fixed in bpmn-js@2.5.1.