Those lines thingy has be a pain all the while and I'm not sure if anything has been done to better it after so many Vue 4 upgrades. In earlier post many months ago, it was mentioned that it has something to do with the "filter". You can tweak around or play with it till you get what is right for you...something I do not pay for. IMHO...I rather do the correction in a Paint program rather than fiddling with it not knowing what you are getting in the end. One thning for sure, even you get rid of the line, you likely to find things different.