I made an .ogg loop of the sound of the rotation map in the library in RealMYST, which is a very quick loop. It came out as 400ms. Whenever I try to enable it, Blockland stops loading (once it executes the music preferences). If I start my dedi with it, and try to join, I stop loading and get timed out, and it never makes it back to the main menu. Even if I disable it, start a game, and synchronize files with the advanced music player, as soon as it reaches that sound, everything stops.
I suppose making the sound work will be an easy fix, but I'm curious as to why it apparently can't handle files smaller than one second.