While reading David Crystal's Sounds Appealing, I came across the following sentence.
There was a Pronunciation Unit that dealt with queries (such as how to pronounce the name of a foreign place or politician), but the range of issues being raised went well beyond its remit, and the small team that staffed it couldn’t cope with the quantity.
I am struggling with the segment but the range of issues being raised went well beyond its remit.
I don't have a problem understanding the meaning of the sentence. It's only when I narrow my focus on the construction range of issues being raised went, I writhe in confusion.
What is the function and category of being raised here?
I would have no problems with the following constructions.
issues were being raised
issues were raised
issues that/which were being raised went ... Is this the same construction and am I only confused because I can't grasp the understood but not used 'that/which were', which could divide the clauses more clearly?
Or is it some complex construction I don't know about?
Or is it a participial phrase in past simple clause which is modifying the noun phrase 'range of issues'?
Something is bugging me about that segment's construction and I can't find out why. Please help.