Verb/subject agreement "Irregularities with nutritional status has/have" [closed]

I am having some trouble with the sentence:

"Irregularities with nutritional status has been recognised as dangerous."

According to https://owl.purdue.edu/owl/general_writing/grammar/subject_verb_agreement.html , this sentence is incorrect, but MS Word's grammar check and my language intuition both say "have" sounds funny.

In my head, I read "Irregularities with nutritional status" as "altered nutritional status" and thus is one thing.

Is there any logic to this?

Edit: I can create more sentences that, to me, would have the same weirdness to it, like:

Multiple suicide ideations has been seen by therapists as a warning sign.

English difficulties has become a problem of this student.

I believe there is a hidden [Having], but I don't know if that plays any role.

Solution 1:

The context will determine whether "Irregularities with nutritional status" is singular or plural.

As a compound noun phrase, it can have a singular concord when used as the name/title/label of a condition/state and thus a category. Effectively, it is the same as "All accidents are worrying but accidents with a fatal outcome is a category of concern."

On the other hand, if "with nutritional status" is merely a modifying phrase that distinguishes its noun from another set of irregularities, e.g. Irregularities with the skin, then it has a plural concord.