There are some critical bugs in this release

Server

e9ab4e3 Allow ROOT users to find suspended/soft-deleted topics and accounts.
3999cc3 Add "sender" header for messages sent with on_behalf_of.
929b752 Define empty FIREBASE_INIT in build.
f26126b Change server version to 0.22.

TinodeWeb

Fix backward scrolling when fetching older messages
https://github.com/tinode/webapp/releases/tag/v0.22.1