Please help with expertise comments to solve the challenge.
The only effect that cause this problem is the presence of the manual line breaks CTRL + ENTER instead of paragraph breaks ENTER only.
To show up those breaks you should go to
Text > show Non-Printable Characters or just click CTRL + SHIFT + C
you should see something like that
So to fix that problem you should replace
the manual line breaks into
paragraph break manually or using an online tool doing the job for you like Line Break Removal Tool
Or just copy past your text into any text editor and find and replace for special charater as CorelDraw didnt support finding and replacing for special character.