I bought an Anker USB C-C cable. I got an LG phone with C, and Qualcomm quick charging on it so I needed some new adapters to be able to charge it at full speed. Gout a couple of adapters, and couple of A-C cables and then said "why not?" and got a C-C cable too. No use for it yet, but I figured I'd get it since I'm sure my next laptop will have C on it.
A few weeks later, Anker sent me a recall notice. Apparently there was a problem in the cables that could cause issues with high power use cases so they gave me my money back and promised a replacement when available.
The issue was actually apparently in the ICs on the cable. Yes that's right, the cables have to have controllers on them too since they have to communicate what kind of power they can handle.
It is likely to be a problem for some time. The good news is A-C cables aren't such an issue since A supports much lower voltages and currents (can only go up to 12v and and like 2.5a) so they don't have to be as insulated and don't need as much protection (apparently a resistor on them does the trick) but still. The C-C stuff though, it will be an issue.