We discussed the scenario internally and we decided that the best course of action would be to revert the change, since the introduced issue is more impactful. The change will be reverted in our next internal build(which will be available next Monday - 25.02.2019).
With this in mind, I am changing the status of this feedback item to Won't Fix. The suggested approach when using a StyleSelector is to utilize the corresponding data item inside its SelectStyle method.
Regards,
Vladimir Stoyanov
Progress Telerik
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