ok I think I've managed to recreate this issue. I'll see if I can work out what's going on and submit a fix. Thanks for letting me know.
thanks, no problem. Got another one
seems lwo3 objects (lw 2018 objects) somehow make unity freak out at loading of scenes. Don't know if this is connected to SVN. Things were working fine, then suddenly they are not upon reload of the project.
When I open the lwo3 in lw 2018.0.7 and save as an lwo2, over the top of the original lwo3 file.. now unity works and loads the level. Of course, materials are destroyed.
Looks to me like lwo3 support is not ready for primetime. I advise sticking to lw 2015 for the use of the plugin atm. lw 2018 needs some loving.
Sorry I cant be of more help with an explanation, there is no way to know what is going on, I have to kill off unity form task manager. All I know is the fix above works to get unity loading a project again.
I'll take a look at those steps you mention to see if I get issues with that workflow.