Rise 3 NDAA has resources restrictions as there are more features involved with the new camera. Thus all Encoders have been limited to load balancing. In order to configure each Encoder to your liking, you may need to enable the function/availability via the new Encoder Management Feature.
Rise 3 v2.1.xxx allows for the User to enable/load balance the Encoder capabilities as needed under the Advanced Media Settings as seen below:
1 of the 4 Encoders MUST be set to 720x480 Only
1 of the 4 Encoders MUST be set to 1920x1080 Only
From there you can choose to configure:
1 of the remaining Encoders can be set for anything between 320x240 to 1280x720
1 of the remaining Encoders can be set for anything between 320x240 to 1920x1080