Whats up with the fast charging on the S9?

[Android Central Question]

When it comes to car chargers, nothing that worked for my S8 will charge using fast charge. Is this a known issue? I can't seem to find anything about it online. I've tried multiple chargers (including my Samsung car charger) that say they work specifically with the S9 fast charging, but don't. Fast charging works just fine on a standard wall charger and even third party ones too.

You guys gotta help me out, I can't keep buying chargers, I'm gonna go broke!