Mac Big Sur Updates - BigFix Reboots Do Not Install

Hey folks, has anyone else noticed that pushing Big Sur OS updates (for example, 11.4 that just dropped) with a post-action reboot does not install the update on reboot? It does stage the update, but it seems that you have to click the actual restart prompt from macOS in order for it to install. Just issuing this post action reboot does not install the update.

Has anyone observed this or have a workaround? Right now manual intervention is needed from our team to get these updates installed properly.