I’ve also been experiencing this bug. I just attempted to do Goemm’s Lab for the second time ever and once again fell through the floor to my untimely doom after a fall. Both times, it has happened to me while working on the Stormy Station portion of the Jumping Puzzle. It’s extremely frustrating, as this is by far one of the harder Jumping Puzzles I’ve encountered so far. At this point, I’m so annoyed by the bug that I’m unwilling to attempt to begin again and will wait for a bug fix before I give it another go.
Other info:
Server — Ehmry Bay
Character Info — Level 80 Norn Guardian