I got a reply from Maxon
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This is a known bug that myself and several other beta testers have reported to the developers at MAXON. Unfortunately there is no fix at the moment other than to use an earlier version of Cinema 4D than R10.5. Everything works as expected in R10.111 and below. I assure you the developers have been made well aware of this issue, so hopefully things will be working as expected in the next dot upgrade of Cinema 4D R10.
Regards,
MAXON Technical Support
(cc)
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