Unresponsiv Touchscreen after replacement on the lower left side.

HI, I replaced the battery and screen on a Huawei P10 for my cousin. It worked out fine, everything restarted as usual. After a few hours she contacted me and said the screen would be sometimes unresponsiv on the lower leftside and bottom side, around the area of the keyboard. It only happens for a few seconds and then it keeps on working. I bought the display on the website of iFixIt, so I guess the qualitiy is fine. Unsure if I did something wrong or just had bad luck with the replacment unit and have to send it back and ask for a replacement again. Any suggestions?