@matrix is going through another wobbly period, when the UX gets a bit unreliable. I'm guessing it's to do with all the big changes being made for Matrix 2.0, and the work on DMA-mandated interop?
Last time Matrix got wobbly was when the core team were working on RiotX and rebranding to @element. Things settled down a *lot* after that, and the UX became much smoother. Fingers crossed that the same will happen again.