Missing button "Add an IP Address"

[trrunde]

NetBox version

v2.11.2

Python version

3.6

Steps to Reproduce

Open a prefix with status Active, press tab "IP Addresses" in previous versions we had a button to the right "Add an IP Address" when we used this the next available ipadress would be pre-populated as a suggestion, and if parent prefix where member of a vrf this vrf where also selected by default.
After upgrading to 2.11.2 this button is gone.
See attached screenshots

Expected Behavior

expected button to be there

Observed Behavior

Button missing from gui