It looks as a bug on our side, we will continue digging in and most probably fix this issue for the upcoming Q3 release. However for the time being there is an easy solution to your problem and that would be to just explicitly specify the field names for all properties. (You can do this by using syntax much like configuration.HasProperty(...).HasFieldName(string)). Another solution would be to switch to auto properties.
Any of these solution would lead to the Inflector not be used because there will be no need to calculate the field name.
I hope this is helpful, please do find your Telerik point updated for reporting this issue.
the Telerik team
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