Cloth scavenging not working?

made some 111 DH speed twinks on 2 accounts for farming BoT trash. Recently I made one of them a tailor to farm extra cloth but the cloth scavenging passive doesnt seem to be working so I did some testing.

Both are farming 25 man normal doing speed clears of the first trash room.
10 resets per session 5 sessions total for 50 clears per character. These are the results

Non-Tailor l Tailor
1st run 252 l 280
2nd run 242 l 239
3rd run 216 l 240
4th run 250 l 264
5th run 277 l 246

50 clears 1237 l 1269

The tailor is only level 1 tailoring in everything with cloth scavenging trained. Is there a profession level requirement as well as having it trained? If so which category? 32 cloth difference over 50 runs is pretty small and well within statistical variance. I have tried researching this but a lot of the information is out of date and conflicting. Does anyone have a concrete answer as to the requirements for scavenging in old content in 8.3?

UPDATE: So after much testing it seems that while simply having level 1 tailoring + scavenging is enough to affect at least some other xpacs ( I only tested BFA and Northrend) Embersilk in Cataclysm is only affected by scavenging if you max Northrend tailoring which seems rather odd.

I was wondering the same thing. I haven’t tested it like you have, but I have noticed that after I loot and then others in my party or raid loot there isn’t any extra cloth for me to pick up as there used to be.

I was just about to post, figured I’d latch on this thread instead of spamming a new one. I too am not noticing a big difference in cloth drops when i farm on my tailor as opposed to non-tailor.

My tailor is maxed in all except Legion tailoring (56/100). I seem to be getting low drops for linen/wool compared to a non tailor character. Embersilk farming in Bastion seems to work quite well, though. (I’m also using a potion of luck there).

Forgive my ignorance, but did it ever work in pre-Wrath content? As the first iteration of cloth scavenging was introduced in Wrath of the Lich King