It's a bit difficult to get back to discussions more than a few days ago, which is unfortunate. I remember having one about #Matrix and #Element and whether it's only a UI issue or something else that causes (my) family members to suddenly need a reset due to expired keys.
Well - my main Element (Linux) client up on the window next to this is currently showing an "Open another device to load encrypted messages" dialog.
It's done so for two days now, and all other clients have been active during that time. They're all verified, they're all in the device list, and "Resend key requests" makes no difference.
I love Matrix, and Element is the client of choice, but there is an issue here that really messes it up for non-techies (and those of us who need to support them).
(While it shouldn't matter, #Dendrite is running the server)