- Fix bug where `/sync` requests could get blocked indefinitely after an upgrade from Synapse versions before v1.109.0. ([\#17386](https://github.com/element-hq/synapse/issues/17386), [\#17391](https://github.com/element-hq/synapse/issues/17391)) - Limit size of presence EDUs to 50 entries. ([\#17371](https://github.com/element-hq/synapse/issues/17371)) - Fix building debian package for debian sid. ([\#17389](https://github.com/element-hq/synapse/issues/17389))