As I was beginning to answer this question, I noticed that the original post is over a year old. Since it is still unanswered, I’ll add my post in hopes someone can benefit.
I haven’t seen this precise effect before, but I have experienced other formatting issues when copying text from a web page and pasting it directly to a word processor such as MS-Word or LO Writer. My solution is to use a plain text editor as an intermediate application. On a Windows OS machine, I use Notepad.
Pasting the copy buffer to a plain text editor removes almost all formatting. (In some cases, I may have to also remove unwanted bullet characters, hard returns, etc., but this is quickly accomplished.) If you are using Notepad, be sure to disable word wrapping before pasting the text into this application.
Once I have prepared the text, I copy and paste it into my word processor document. In most cases, the document formatting in the receiving area applies to the pasted text automatically. Otherwise, I format the pasted text as necessary.
I use this approach often. It is much easier than other methods I have tried.