Geremia 24p works fine for me on S905X. Please post link to a sample that causes issues for you.
Found the issue (which seems to be kodi related?), if i set kodi interface resolution to any interlaced resolution (50i, 60i) then the auto framerate doesn't switch to 24p, instead it choose 60i with 2:3 pulldown
Code
21:44:50 T:546546381024 NOTICE: fps: 23.976024, pwidth: 1920, pheight: 1040, dwidth: 1920, dheight: 1040
21:44:50 T:546546381024 DEBUG: OutputPicture - change configuration. 1920x1040. framerate: 23.98. format: BYPASS
21:44:50 T:546546381024 DEBUG: Resolution 1920x1080 @ 50.00i - Full Screen (16) not a very good match for fps 23.976 (weight: 0.043), trying 2:3 cadence
21:44:50 T:546546381024 NOTICE: Display resolution ADJUST : 1920x1080 @ 60.00i - Full Screen (17) (weight: 0.001)
If kodi interface is set to any progressive resolution, the auto refresh rate finds the correct nearest best resolution 24p