Hi Paul,
This is more an anoyance than an issue, not sur eif there is anything that can be done?
When I have Poser/Octane open and working on props or humman figures tweek skin, hair, wall whatever then make a figure or objeect / prop not visable in poser to test something or to composite work then make that same object visable again in poser octane has lost all the changes made and i sreset to defaults.
Anyway to avoid that? Its time consuming to have to go back and re apply mats, make chagnes and sometiems remember changes i made if i had not saved out the materials etc...