Clean vases VS bleeding vases

Hi from Marseille ! Here every day for months, but first post today after joining in ! When they leave the giant head room, it's pretty strange that only one vase was "bleeding"... The one we see with David starts immediately bleeding even before he examines it ("sweating" he said).  So, the question is : why not the others too, at this time, since when they come back to this room, it's every where ? Seems odd to me 'cause David took off one clean vase. An other plot hole ? PS : i used search input