So it would remain, until last year, when Thayne Currie at the University of Toronto finally made an independent confirmation of the planet, presenting new observations, re-examining old observations, and giving a brand new detection at a new and much bluer wavelength of 400 nm. After showing that Fomalhaut b was actually quite unlikely to be observed in infrared, and recalculating some details about it, Fomalhaut b was once again starting to win people over.
Finally, a third group of researchers, Raphael Galicher and Christian Marois, independently detected and confirmed it. This was indeed a real planet we were all looking at.
Galicher and Marois could tell, this was a rather unusual planet they were looking at. Its spectrum of light suggests that it lies shrouded in dust, perhaps a huge ring system or the aftermath of a recent collision between two dwarf planets. The latter idea would nicely explain a narrow and suspiciously new outer disk seen around Fomalhaut.
If current calculations are proven to be correct, Fomalhaut b is due to dive back into that debris disk around 2032, at which point astronomers will start watching very carefully to see if they can spot any collisions with further objects. If the planet orbits in the same plane as the debris disk, such collisions are entirely possible.