BPMN diagram arrows strange visualization - Angular

I’m using Angular CLI 15.2.11
My bpmn js in the project is: 17.11.1
I’ve included the bpmn-js.css in the package.json as well.

The idea of my project is to upload a bpmn.xml file and see it on the screen, and possibly move the components around.

When I upload a test bpmn diagram, everything is ok. But…
image
If I try to move any of the components or arrows, look what happens:
image2

My arrows become big rectangles with big dots.
I would be really glad to know why that is happening and if there is a fix.

I could provide code for further assistance in resolving this.

Looks like you did not include the relevant stylesheets. That should fix your modeling issue.

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