Tigera operator seems to send about 25 -50 update requests to apiserver for /api/v1/namespaces/calico-system' every five minutes.
Not really a problem for me but a customer complained this was noisy and crashing another security component that was monitoring namespaces. So I looked a little bit deer, got some errors around ippool to go away but the updates persisted. In the end looking at audit logs I could only find two diferences in requests and resposne for the namespace. The request did not include finalizders and hid a slightly differnt creation timestamp format.

This may be expected behaviour but thought I'd report in case it was unintentional.