I have been engaged in conversation with people in Shadowfen for 4-5 hours now about the Tide-Glass Beads not working/dropping. Someone in zone mentioned making sure there were no other gold leads active. So I had the Nest of Shadows gold lead in Shadowfen, scryed it, then the next node(or two, I don't remember) I got the Tide-Glass Beads. A lot of others in Zone chat said the same thing happened for them and they were able to get the lead. Everyone said they had the Nest of Shadows lead, scryed it and they got the new one.
Not POSITIVE this is a bug, but it seems extremely coincidental that everyone that's been having bad RNG for 4 hours all gets the lead after scrying the same lead. Seems like it's worth testing out internally to confirm.