Duplicate Line Breaks Removed on Paste in WYSIWYG Editor

[urielMalnovitzer]

Description: When pasting text into the WYSIWYG editor, all duplicate line breaks are removed. This issue occurs even when using plain paste (Cmd + Shift + V), which should preserve formatting. As a result, the intended spacing of the text is lost. In some cases, depending on the copy source, the text initially appears correct, but switching back and forth between the editor modes removes the multiple line breaks.
Steps to Reproduce:

1. Copy the following text:

   Lorem ipsum: Lorem ipsum dolor sit amet
   Lorem ipsum: Consectetur adipiscing elit
   
   
   
   
   
   Lorem ipsum dolor sit amet
   
   
   Incididunt ut labore et dolore magna
   
   Duis aute irure dolor in reprehenderit in voluptate velit esse
   cillum dolore eu fugiat nulla pariatur velit
   

2. Paste it into the WYSIWYG editor.

3. Observe that all duplicate line breaks are removed, resulting in incorrect formatting.

Expected Behavior: The pasted text should retain its original formatting, including multiple consecutive line breaks.
Actual Behavior: Actual Behavior:
Duplicate line breaks are automatically removed, altering the structure of the text. Switching between editor modes also removes multiple line breaks in some cases.
Environment:

• Toast UI Editor Version: 3.2.2
• Browser: google chrome