Thanks for getting in touch and I'm sorry to hear you're facing that issue. I can't currently reproduce the issue here on a simplified scene - it would appear to work as expected. Are you able to send us one of the problematic scenes (you can strip out all uneccesary objects) so that we can better identify the cause. If you'd rather not post it publically, please feel free to email it to helpdesk@itoosoft.com using wetransfer or similar,
Many thanks,
Paul