the new frontend does not handle invalid handles particularly well. you can open a repo on that account via the DID just fine. but all the links in there point to handle.invalid/[repo] as the repo. which of course breaks all the links. these should really use the DID instead when the handle is invalid so everything that isnt handle dependent still keeps working'
this can currently be seen with the opensocial.group account. https://tangled.org/did:plc:epbi6paber3mxm7237xkwvj5/proposal works just fine. but the issue tab there-in links to https://tangled.org/handle.invalid/proposal/issues instead of https://tangled.org/did:plc:epbi6paber3mxm7237xkwvj5/proposal/issues
fixing