* Element-R: implement encryption of outgoing events ([\#3122](https://github.com/matrix-org/matrix-js-sdk/pull/3122)). * Poll model - page /relations results ([\#3073](https://github.com/matrix-org/matrix-js-sdk/pull/3073)). Contributed by @kerryarchibald. * Poll model - validate end events ([\#3072](https://github.com/matrix-org/matrix-js-sdk/pull/3072)). Contributed by @kerryarchibald. * Handle optional last_known_event_id property in m.predecessor ([\#3119](https://github.com/matrix-org/matrix-js-sdk/pull/3119)). Contributed by @andybalaam. * Add support for stable identifier for fixed MAC in SAS verification ([\#3101](https://github.com/matrix-org/matrix-js-sdk/pull/3101)). * Provide eventId as well as roomId from Room.findPredecessor ([\#3095](https://github.com/matrix-org/matrix-js-sdk/pull/3095)). Contributed by @andybalaam. * MSC3946 Dynamic room predecessors ([\#3042](https://github.com/matrix-org/matrix-js-sdk/pull/3042)). Contributed by @andybalaam. * Poll model ([\#3036](https://github.com/matrix-org/matrix-js-sdk/pull/3036)). Contributed by @kerryarchibald. * Remove video tracks on video mute without renegotiating ([\#3091](https://github.com/matrix-org/matrix-js-sdk/pull/3091)). * Introduces a backwards-compatible API change. `MegolmEncrypter#prepareToEncrypt`'s return type has changed from `void` to `() => void`. ([\#3035](https://github.com/matrix-org/matrix-js-sdk/pull/3035)). Contributed by @clarkf. * Stop the ICE disconnected timer on call terminate ([\#3147](https://github.com/matrix-org/matrix-js-sdk/pull/3147)). * Clear notifications when we can infer read status from receipts ([\#3139](https://github.com/matrix-org/matrix-js-sdk/pull/3139)). Fixes vector-im/element-web#23991. * Messages sent out of order after one message fails ([\#3131](https://github.com/matrix-org/matrix-js-sdk/pull/3131)). Fixes vector-im/element-web#22885 and vector-im/element-web#18942. Contributed by @justjanne. * Element-R: fix a bug which prevented encryption working after a reload ([\#3126](https://github.com/matrix-org/matrix-js-sdk/pull/3126)). * Element-R: Fix invite processing ([\#3121](https://github.com/matrix-org/matrix-js-sdk/pull/3121)). * Don't throw with no `opponentDeviceInfo` ([\#3107](https://github.com/matrix-org/matrix-js-sdk/pull/3107)). * Remove flaky megolm test ([\#3098](https://github.com/matrix-org/matrix-js-sdk/pull/3098)). Contributed by @clarkf. * Fix "verifyLinks" functionality of getRoomUpgradeHistory ([\#3089](https://github.com/matrix-org/matrix-js-sdk/pull/3089)). Contributed by @andybalaam.