Fix finding event read up to if stable private read receipts is missing (#2585) (#2588)
Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>
Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>
(cherry picked from commit 478270b225ec6c816620ee16da394e82096e75dd)
Co-authored-by: Šimon Brandner <simon.bra.ag@gmail.com>