Thank you for the provided information.
I tested the described scenario in the Pinned/Frozen Rows example from our demos, however I was not able to replicate the same behavior. I am attaching a video demonstrating my test (you can drag&drop the video in Internet Explorer in order to watch it).
May I ask you to share a sample project that reproduces that observed on your end result in a new support ticket (since projects cannot be attached to forum posts)? This will hopefully allow me to investigate the scenario and better assist you.
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