A list of links renders one card each again
Preview cards are meant to be embedded as a list — that is the whole point of the grid. Four links in one reference, four cards.
Instead you got one card, and a broken one: the four addresses were glued together into a single address that leads nowhere, so nothing could be loaded for it. What rendered was a lone card labelled with just the site's name — for all the world a broken link to the portal itself.
The cause was narrow. A card list can be written two ways: as a query on the end of the reference, or as part of the reference's own path. The query form split its list on the commas correctly; the path form never split at all and treated the whole line as one address.
Both forms now split, and they accept the separator whichever way it arrives — plain, or in the escaped shape a link picks up when the reference is encoded as one piece. If you genuinely need a comma inside one address, write it doubly escaped, or use the single-link form, which never splits.
While fixing it, one related annoyance went too. A card whose page cannot be reached used to fall back to showing just the domain, so a row of unreachable cards all read alike and none said where it led. Such a card now shows the page's own name — Reinsurance, Underwriting — and still links exactly where it always pointed, so what you read and where you land agree.