Hello,
Last week I began experiencing an issue where the asset manager will import all mesh objects however, upon inserting regularly or using to location, it’ll skip over a handful of objects and throw an error in the output. Attempts to re-export the selected objects that failed and re-upload to studio isn’t working either. I have verified that it isn’t just inserting them invisible. Instead, it’s not dropping them into workspace at all. My sister appears to be experiencing this same bug as well. I am currently under contract and the game is planned to launch very soon. This has greatly effected progress time and I’m in hopes to please see a fix to this soon 
Output log (bottom line) below shows 10 objects out of the 59 I just uploaded for a subway train car had failed.
Best regards,
SarahDevs
Expected behavior
All objects within the uploaded file should be inserting into workspace.