Thanks! I'm still in the room with no feedback that sending the message failed, but from the room's point of view it's now private.
One other thing: my message was still posted by @matrixbot, rather than by my Matrix user. Is this another case of every client having to migrate (I'm using Fractal)?
If you see messages directly from `@matrixbot` in the chat area, then that means that the room is still plumbed using the old Gitter bridge. We're working on a plan to migrate rooms using the old bridge over to the new one, https://gitlab.com/gitterHQ/webapp/-/issues/2674
Are you sure it's a room issue? In the same room where my message was sent directly by @matrixbot, I can also see an earlier message from someone else from @theiraccount:matrix.org.
One other thing: my message was still posted by @matrixbot, rather than by my Matrix user. Is this another case of every client having to migrate (I'm using Fractal)?