[Full Changelog](https://github.com/matrix-org/matrix-js-sdk/compare/v5.3.1-rc.2...v5.3.1-rc.3) * Fix cross-signing/SSSS reset [\#1323](https://github.com/matrix-org/matrix-js-sdk/pull/1323) * Fix: crash when backup key needs fixing from corruption issue [\#1325](https://github.com/matrix-org/matrix-js-sdk/pull/1325)