I fell out of the world when it didn't load properly. I don't want to advertise my own twitter feed too much but there's a bunch of other tweets there showing off the weird proclivities of this (like, for example, riding/wearing the two Legions you can allows you protection from the void boundary and that leads to some weird shit)
I had the exact same thing happen in the same spot but
it was right at the start of file 10 when you reach that location for the first time, so my first thought was that Hal's secret base was actually floating in the sky, which is why he had been so cagey about saying where you were. Took me a sec to realize it definitely wasn't intended lol.