Hello Grzegorz,
We just found an issue related to the .Net 4.6.2 and recycling of the GroupHeaders that might be causing the observed behavior on the screenshot. The fix will be available with the next official release (mid September), so once it is live please test it and let us know if it resolves the problem on your side.
I'm looking forward to hearing from you.
Regards,
Kalin
Telerik by Progress
We just found an issue related to the .Net 4.6.2 and recycling of the GroupHeaders that might be causing the observed behavior on the screenshot. The fix will be available with the next official release (mid September), so once it is live please test it and let us know if it resolves the problem on your side.
I'm looking forward to hearing from you.
Regards,
Kalin
Telerik by Progress
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