Element Call 0.28.0 bundles a matrix-js-sdk that no longer publishes
livekit_alias in the call membership's foci_preferred (element-call #4307,
matrix-js-sdk #5573). Ruma requires the field, so the Rust SDK in
Element X iOS and in this app discards the membership: the iPhone shows a
plain notification instead of ringing, and Android no longer notices a
cancelled call. 0.26.1 is the last release whose js-sdk still sends the
alias and is the version Element X iOS embeds.
Sedat Qaja
joel.poyet