I agree. We've got two of those Nokia chargers and two Nokia Lumia 920s. In general, everything usually works fine. But, the problem has happened occasionally for both phones and both chargers (in one case, it actually drained the battery and shut down one of the phones). It's now happened once on one Nexus 5 on one of those chargers. I highly doubt it's an issue with each of these specific phones or chargers. I'm guessing it's systemic.
Anyway, I've just grown tired of worrying about it. Sticking the USB plug in is a bit more hassle and, over time, might break a pin, port, or plug at some point from wear and tear. But, I've never had a phone overheat from charging that way.
Those TYLT chargers sure are nice looking, though.