Samsung S5 Graphics Error under Lineage

I just got a refurbished S5 and installed the latest Lineage OS ([lineage-14.1-20171123-nightly-klte-signed](https://download.lineageos.org/klte) on it. Most of the time everything works normal. Sometimes, however, the graphics gets really weird (see images). Other family members have the same phone and I also flashed Lineage on them without experiencing these problems. Therefore, it cannot be a general problem. Any ideas about what might be wrong with the phone and how to fix it? Edit: This problem was also reported [here](https://forum.xda-developers.com/galaxy-s5/help/graphics-overlapping-issues-t2987899) but no solution was documented.