Unwanted breaklines inside quotes : how to fix this ?

[SecondSight]

Hello !

On my board, when I make a quote, I get a breakline inside quote : before and after the text. This forces me to edit the message to remove the breaklines each time I make a quote.

Example :

Is there a way to fix this ?

Thank you.

[opentype]

Turn off all third-party plugins/apps one by one and see if one of them causes it. 
If it still remains, open a support ticket.