diff --git a/release-notes/unreleased/1732.upgrade.rst b/release-notes/unreleased/1732.upgrade.rst
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+The :meth:`.QiskitRuntimeService.backends` now always returns
+new :class:`IBMBackend` instance even for the same query.
+The backend properties and defaults data are retrieved from the server
+for every instance when they are accessed for the fist time,
+while the configuration data is cached internally in the service instance.