May I say that this may (or may not) work -- I don't know since I have fully loaded 128k iPhone and I am **NOT** inclined at all to pend the **hours** required to re-init my phone.
As a developer, I can say this:
1) Apple, by applying the moniker of Apple "recommended" is (basically) saying that this sort of malfunction (which is common in my experience) is the fault of the customer's, actions, device setup or results from some type of device corruption (without ever explaining what the heck the problem manifests or what it is supposed to mean as a UI element, and without addressing or explaining the problem-state that this represents (in any way that neither I nor anyone I know can find) is symptomatic of Apple software support. "Never explain", "Never excuse", "blame the customer" is not only only egregious but is the default position of support organizations that do not really care to support their customers;
2) as an active Mac dev and user (and engineering manager) since 1984 (yes, a first gen Mac user), having spent or authorized (literally multiple) $100,000+ 's of $$ of Apple products and SW, I can say (without equivocation) that iTunes remains the "steaming pile of cr##" that Mossberg called it a few years back ----> the instances of poor UI, insensitivity to normal usage and so on are silly too numerous to list here;
3) I have an ticket open with them on a related matter (purchased content downloading multiple times) and have simply allowed more than one similar tickets to expire out of exasperation.
This adds up the following: as a user-generated suggestion, this a very good idea -- so, kudos to @turingtest2. On the other hand, if this is indeed an "Apple recommended" solution (as it claims to be), with all respect, it neither helpful nor reasonable - and simply verifies what (literally) everyone I know (in and out of the developer communities) believes -- that iTunes is (by far) an example of all the ways that Apple-provided SW has gone off the rails.
Sorry for the rant but I have probably 500 Apple-purchased songs that **suddenly** and **without explanation** (and **randomly** now carry this **unexplained** and ridiculous dotted-circle designation.