Onion Skins Missing for OBJs (or not?)

[neilhammers]

Hey,

Are Onion Skins working for 3D objects?

I have those enabled (Timeline button / View>Enable) with several ticks before and after the current time, and nada. Tried to enable/disable OS pull-down menu switches, 'Selected layer only' including.
Could not find anything else OS-related in the manual, just those two entries - 16.08 and 24.17
What tick am I missing?

Moho 14.1 @ Windows 11 Pro(22H2), Intel i7, 64 RAM, Nvidia GF RTX3070 with latest drivers.