@BrianJM I have seen this with my TC55 (C720) camera as well. It doesn't actually affect my camera's functionality or IP address, but perhaps that is because I have a static reservation for the camera in my DHCP controller. When the app shows the camera has a locally-assigned static IP (instead of showing DHCP like it should), that IP matches what I assigned in the DHCP controller, so the camera IP hasn't actually changed.

  @adfooz This is only not a problem for you because you have allocated a static IP address in your DHCP server for the camera.  People (i.e. everyone) should not have to do that and when you do not do that, a host (i.e. these cameras) that takes a DHCP assigned IP address and then just uses it as a static IP address without renewing the DHCP lease is going to break the network when it continues to use the address after it's lease has expired and the DHCP serve provides that same address to a new client.

This is absolutely broken behaviour and it is going to break networks.

How do we report this as a bug so that TP-Link fixes it and doesn't break everyone's network?

  @BrianJM I definitely agree it is a problem, I was just sharing my experience and providing a potential workaround for anyone who needs it.

To report this, you could try the Contact Technical Support form on TP-Link's website.