Text is duplicated when pasted into a Test Run Custom field (text type)

Description
When text is copied and pasted into a Test Run custom field of type “Text,” the pasted content is entered twice.

This only occurs when using copy/paste. Entering the same content manually does not appear to cause duplication.

Pre-conditions

• Create Test Run Custom field of type “Text”
  

How to reproduce

1. Create a Test (same Test type you configured the Test Run Custom Field) and execute it
2. Locate the created Test Run custom field
3. Copy (Ctrl+c) any text from another location.
4. Paste (Ctrl+v) the text into the custom field.

Actual result/Attachments
The pasted text is duplicated in the field.
In the following example, I copied from the Comment field the "this is a test"

Expected result
The text should be pasted only once, exactly as copied.

Workaround
Enter the text manually instead of using copy/paste.