Thank you for the provided sample.
This appears to be a bug and has not yet been reported. I have forwarded the report to the Dev team.
Since you have given us details and steps to reproduce this behavior, I have awarded you Telerik Points as a gratitude.
As for a workaround, setting at least one column to be always sticky as shown in the demo seems to fix the issue.
title: "Ship Address",
I apologize for the unexpected behavior.
Let me know if you have any questions.
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