When playing on a controller, it's possible to sail a boat to the edge of an island in a lily biome and use the B button to exit into the sky.
Steps to Reproduce
Find lily biome bordering edge of island, boat to edge, hit B to get off
Find lily biome bordering edge of island, boat to edge, hit B to get off
A developer has marked this issue as fixed. This means that the issue has been addressed in the current development build and will likely be in the next update.