Going forward, we limit our support for new installations to Apache and recommend a switch to Apache for setups currently running on NGINX. We will continue to support NGINX for existing customers for both VOD and Live, but we won't work on feature development for it. In short, support for NGINX should be considered deprecated. Do note that this does not affect our recommendations of using NGINX in other parts of your video streaming setup, such as for (shield) caching.
See also What is the preferred webserver for media delivery? for a detailed outline and background.