TL;DR: To get rid of the drift, replace your TrackPoint cap with a fresh one that really fits your laptop model. Get a pack of caps on Amazon or ebay (P/N 4XH0L55146 might be a fit). Even if you own a brand-new laptop and have never changed the red cap yourself, try changing it, as the manufacturer might have confused the parts or use the cap which are slightly misaligned.
I'm a heavy IBM/Lenovo ThinkPad-s user over a span of the last 15 years: T61, x120e, W520 2x, T430s, T460p, x1, and lastly – x1 Extreme. The only one which had a famous TrackPoint drift is x1 Extreme. I've been using it since September 2018 – almost 4 years by now, and though I really liked it, the drift made my experience vastly unfortunate. I've actually abandoned using TrackPoint, so painful this was. I've made many attempts to fix it (more on this later).
Thus, it was even more to my surprise that I've found a very simple solution to a TrackPoint drift problem.
