Auto Upgrade 12.1.6 RU6 MP6 to 14 MP2 - Known Issue?

Hi,

one of our customers had a problem with the Auto Upgrade feature. At first everything worked fine, but all of a sudden it didn't work anymore, even tho the clients said that they accepted the upgrade package.

The customer was able to "solve" this issue by unchecking the "“Include virus definitions in the client installation package” option.

Is this a known issue when upgrading from 12.1.6 RU6 MP6 to 14 MP2? If so, does anyone know if this issue will be solved in 14 RU1?

Thanks in advance!