Running latest OctaneRender™ for Blender 2022.1 - 26.0 [TEST] build.
Windows 21H1 19043.1466
2 x GTX 1080 Ti
NVIDIA Drivers 472.12
Lights get broken in 26.0 when you're using Use Nodes option and duplicate a light. When light is duplicated the shader network is copied incorrectly. I tested it both with area and mesh lights.
Also there is no shader network representation available in the Nodes properties panel.