The two RGs show up on one line instead of in two <tr>s.
I think this is actually the same bug as MBS-4796, but just looks different because the artist here has no other release groups whereas the one on MBS-4796 does.
Doesn't seem to be a duplicate. MBS-4796 has been fixed – and works --, this one here is still broken.
Still broken, reopening.
Looks like what's missing is the wrapping <table>; view-source shows that they're in nice <tr> and <td> already.
ianmcorvidae/mbs-4817-no-type-rg-table is now in beta.