I play on a private server hosted on a spare PC so there's no chance someone else took them. I checked all the RPT files with search terms "light" and "construction" and didn't see any reference to them. If there is something else I can check please let me know.

Having the exact same issue. I have a gas can with 73% volume and after doing laps around the vehicle for 5 minutes recieved no scroll options to refuel the V3S. This is as of the 30 July update on EXP .58.