Outstanding claim effects other properties?

[Chris M.]

I had a claim 6 months ago due to storm damage of a roof.  The insurance company has not denied the claim and is not responding to my messages so the claim has just been left open.  I need to purchase insurance for completely separate properties in my portfolio, but the insurance broker is telling me that I can't bind any new insurance until this claim is closed.

How could it be that one open claim prevents me from insuring other properties?  How do big investors avoid this issue?