Thank you for contacting us.
I tried to replicate the issue you are experiencing with RadEditor in Chrome on our site but no avail.
I'm attaching a video demonstrating the test.
I would advise you to revise and clean the styles on your page and if the issue is still reproducible to send us a simple, fully runnable project
so we will be able to reproduce and examine it locally.
Looking forward to hearing from you soon.
the Telerik team
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