Ext.NET 4.8.1

When using mouse wheel in number fields, the behavior has changed. Earlier when scrolling up, the value in the field would increase, and when scrolling down, it would decrease. In the latest version (4.8.1) this has changed to the opposite, and it has become quite confusing for the user.

The problem occurs in the Ext.Net demos of number-field.

I checked in the ExtJs-demos over at Sencha, but the problem does not seem to be there.