Are you using the built-in Generic Z-Wave Smart Dimmer driver? And can you show a screenshot of an offending app/rule that causes this behavior, assuming you're not able to replicate it by manually using the "Set Level" button on the device page? Just thinking of things that might help staff track this down.
Try removing the 35, saving the app (hit Done), then go in and put 35 in again. If you had it set up this way on the previous version, it would have saved the level with the wrong data type, which could cause this problem with many drivers.