Zeppelin interpreter timeout properties are not working if we add it in spark interpreter settings

I have created a spark interpreter with below properties in interpreter settings and it is to timeout the spark interpreter after 30 mins. However it is not working. Also I tried removing 10 mins timeout setting from zeppelin-site.xml but it is impacting our other spark interpreters as well. Please help us with the resolution. Thanks!!

1. zeppelin.interpreter.lifecyclemanager.class = org.apache.zeppelin.interpreter.lifecycle.TimeoutLifecycleManager
2. zeppelin.interpreter.lifecyclemanager.timeout.checkinterval = 60000
3. zeppelin.interpreter.lifecyclemanager.timeout.threshold = 1800000
4. spark.dynamicAllocation.cachedExecutorIdleTimeout = 1800s