diff --git a/changelog.d/19003.misc b/changelog.d/19003.misc
new file mode 100644
index 0000000000..0eb4399406
--- /dev/null
+++ b/changelog.d/19003.misc
@@ -0,0 +1 @@
+Fix `server_name` in logging context for multiple Synapse instances in one process.
\ No newline at end of file