A previous incorrect form of m.topic used by matrix-js-sdk TODO remove this after a few releases https://github.com/matrix-org/matrix-js-sdk/pull/4984#pullrequestreview-3174251065
A previous incorrect form of m.topic used by matrix-js-sdk TODO remove this after a few releases https://github.com/matrix-org/matrix-js-sdk/pull/4984#pullrequestreview-3174251065