The most-referenced [silence] recording has over 2,000 gid redirects. These are all outputted in the sameAs property in its JSON-LD, including on release pages that reference it. If the release contains [silence] multiple times, as https://musicbrainz.org/release/86427535-9abb-4681-8c88-5c651e55d62a does for example, then this is multiplied. (The linked release references [silence] more than 50 times, and contains a 7.75 MB chunk of JSON-LD.)

It also so happens that Google reports "Structured data with syntax errors" on this page, with "Incorrect value type" as the reason (but the part of the source it highlights as having an error makes no sense). So we're wondering if this is just due to the size of the page hitting some internal limits that Google has.