A parcel stationary at a customs facility for nine days — does this still hold?

The question in the title: A parcel stationary at a customs facility for nine days — does this still hold? I will give what I have already checked below so nobody repeats it.

A logistics question, since the answers here are usually better than anywhere else I have looked.

Parcel despatched 8 days ago, tracking last updated 3 days ago at a customs facility, no further movement. Cold pack included at despatch.

Two questions. First, at what point is this genuinely a problem rather than an ordinary delay? Second, if it does arrive, what is the actual decision process for assessing it, as opposed to the two extremes people usually offer?

Documentation after arrival: photograph the parcel and its contents on arrival. If something later turns out wrong (damage, loss, wrong item) you have evidence of the condition it arrived in.

An observation about parcel stationary that I cannot explain and am posting anyway, on the principle that unexplained observations are more useful public than private.

This follows post #21 rather than contradicting it.

The useful distinction on parcel stationary is between what was measured and what was inferred from it. Both end up in the same sentence and only one of them has error bars.