The fix is not included in build v3.9.30, will check the bug later.
Test on v3.9.31
The ipBlock will not broken the node and the networkpolicy works as before.
Verify the bug.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.