Can not expand the "JMX[connected" tree in "Servers" tab with Fuse 7.9 karaf

With Fuse 7.8 karaf instance, user can connect JMX and expands the tree on "Servers" tab. However, with Fuse 7.9, expanding tree operation never ends.

Instruction

1: install Red Hat Fuse 7.9 karaf standalone
2: on the same mashicne, start Red Hat CodeReady Stuio
3: By following our official document, add and start the installed karaf runtime
https://access.redhat.com/documentation/en-us/red_hat_fuse/7.9/html/tooling_tutorials/ridertutdeployfesb
4: On the "Servers" tab, right click "JMX" under the added karaf runtime and select "connect"
5: Once you observer "JMX[connected", click the JMX icon and expands the tree, but it will never shows up child nodes