What do you base this comment on, have you had problems with chucks other than Vivmarc and Oneway coming loose?
The nova chuck standard jaws have a little bump( for want of a better term) on the inside rim.
The one way profile jaws are straight on the inside with teeth. - standard on the ONEWAY
The Dovetail jaws have a dovetail notch on the inside standard on the vicmarc.
I have dove tail jaws on my vicmarc and for my ONEWAY and use those on bowls. My wife uses dovetail jaws on hers and after watching her turn big platters with a short short tenon i saw the value of dovetail jaws.
Tenon failures occur from not having a flat surface of the wood touching the tops of the jaws and/or not having a good tenon match to the jaw profile.
Most beginners don’t cut the little notch for the Nova well. Fuzz or missing groove in the corner of the tenon likely results in the tenon walking out of the chuck. Tenons walking out of the chuck can snap off or pull free of the chuck. The notch also cannot be higher than the bump on the Jaws or the tenon will pull out to the edge of the notch and wobble or break.
The dove tail wants a clean corner and a close match to the dovetail. A mismatch will often result in letting the tenon wobble in the chuck. Wobbling combined with and aggressive cut can break the tenon
The ONEWAY likes a true 90 in the tenon corner but can tolerate the tiniest bit of fuzz or tiny round in the corner.
The easiest tenon for beginners to master is the 90 degree. They can see it. They can test it with a square.
Cutting nice dovetail with a spindle gouge requires practice. Scrapers can be made to match a dovetail, however they often leave fuzz in the corner. Too much fuzz and you get a wobbly tenon.