Maybe your log4j2.xml was not updated.
Please check that commit.
For me the file location is:
/var/lib/openhab/etc/log4j2.xml
Add the lines:
<!-- Filters warnings from broken connections during startup -->
<!-- https://github.com/openhab/openhab-core/issues/2998 -->
<Logger level="ERROR" name="org.apache.cxf.phase.PhaseInterceptorChain"/>