Ah ,yes it was a mistake from me, it should be a green plant !About your sound 'bug' it strange, do you remember where it start?I think there is no way to fix it expect where you'll find another location with this sound it could stop.. I guess..
Thanks for the report from water spot, it was effectively a bug !About the sounds, I'll check for this, when you use teleport !
Thank you ! ♥