Why does my screen show this “transparent” line?

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Hello IFixIt, I recently had a problem with the phones screen and I went ahead and fixed it with the tutorial on here. However after basic use and some tests I found out this weird line that impairs the average daily use. Any fix/idea on what it is? I think it is a problem with the phones LCD, Let me know what you think.

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0