Last night I landed my mini, went inside my base, and the server auto rebooted at that moment. It was 7am, and I went to sleep then, as I believe other players too.

Today, I woke up near the mini copter, jumped into it, engines on, climb a bit, engines out, no fuel. I believe because server rebooted, the plugin didnt trigger on players going to sleep, and after reboot, Rust just reloaded all the copters as normal.

This was finally fixed in v2.7.0. The issue was that minicopters using the unlimited fuel option had to have their fuel consumption reset to 0 upon loading a save. Otherwise, they would quickly run out of fuel since only 1 lowgrade is added to them when spawned.