4 Voidstones breaks map Drops

After Socketing 4th voidstone I've had 0 natural map drops despite full clearing over 10 juiced t16 maps half with cartography scarabs.

-Started with 9 Favoured maps and reduced to 0 with no changes

-Only maps dropping are due to mechanics i.e. Conquerer, connected maps from bosses due to atlas passive nodes

-Other unnatural sources of maps such as blight map chests and Arch nemesis map mod drop maps at the wrong tier, lots of t4 mostly under t10 despite the atlas tree being all t16

-Removing the 4th voidstone causes map drops to return to normal (Not a solution since the map I want requires 4stones to drop at t16)

-Resocketing the 4th voidstone may have helped since I got 2 natural map drops from 3 t16 juiced maps 1 from each of the first 2 none from the 3rd in which I used a gilded cartography scarab and allocated 5 favored maps. Whether I was mistaken about the source of these 2 maps being natural drops or not, It is clear that the voidstones are significantly impacting the drop rate of maps when 4 are socketed.

Additional Notes
-blighted map drops from blights during test were all t12-13 when they should be t16

Will do more testing tomorrow and update if no fixes.

If you have had a similar experience please comment with any extra details this is making it impossible to sustain what I want to run or even just t16 in general.

Bug Report Number: 1,524,583,246

This is also happening to me. Just ran a T16 Burial Chamber with strongboxes enraged, gilded ambush, ambush, got a delirium mirror, and 0 maps dropped in the whole map. I ran through the map holding alt to double check, and this is not the first map that I've noticed this. Removing stones seems to fix the droprate.

Edit: I can confirm that if I open a map at 4 stones, remove a stone, and run the map, that map drops noticeably appear to start working correctly again.

The atlas tree I'm using: https://www.pathofexile.com/fullscreen-atlas-skill-tree/AAAABgAAgAAbAB8AugRvB4gJ-AoZC3EOvg7iD2MQsBLAFHcXyxg5GMQbTh10H2YhxSbnKNAphyqEMAMySzPkND05jkFfQYxCc0J3QyNDqUfPSABPYU-JT9hQF1P7WEVc2V3HYGdjtWWkZ-lp1WsCbElsfmyQbX1tpW4qb39zi3T6dsJ3FHnDev17Cn0Tf6SD3YgZiG2K0Y_UkiycK52xnkmh0aLepDaoL6ttq6ysEKwfrdauYq_Bsma0hrbouYC6TLrKuyq8qMAZwv_EScX-xjPIfsjlyaHQotEk1LnWMNZb2LXavdrO4Yvlj-Xs6o3q1et-7sH0DPVM-Pr5APow-tr7-f3J_dEAAA==

Bug report number: 3,564,807,182

Having the same issue, I've been using all 12 favoured map slots and no Burial Chambers are dropping, but when I favour Ashen Woods which is a natural t16, I can sustain them.

This sounds like the same problem as the Kirac missions.

With Kirac missions, if you run a unique map, the highest map completed incorrectly uses the base tier of the unique. (So, people in white-tier maps are being offered unique maps displayed as a white tier, but then only getting red-tier missions after that.)

With this bug, although I can't confirm or deny it myself, the favoured maps also seem to be working off of the base tiers of the maps, rather than off of the adjusted tiers from the socketed voidstones.

In other words, several different mechanisms are using map base tiers when they shouldn't be.

Confirmed this bug as well, however I have only 3 Void stones. With 2 voidstones and Dunes favorited got many dunes maps. With 3 Void stones and Jungle Valley favorited I have gotten zero Jungle Valley after running 30 fully juiced maps. Map drops in general are extremely rare now.

Speaking of which, my 3rd voidstone was Maven, was that your 4th?

I can confirm there's some odd about map drops with void stones too. Getting zero favored maps with 4 stones. Removed the stones and started to get maps again.. but not that many favored ones still.

Also - If I understand it correctly - if there are no voidstones socketed at all, the map drop rate goes down by 300%.

According to Grimro and how the map equity system works.

I believe that it should not work like that..

I was looking for this, as i found my map sustain to be horrible after getting 4th stone.

I didnt get any maps beside the ones connected to the one map i was running, nor was i getting any favoured maps at all.

I am going to remove one stone now so i can actually play.

Something like this happening to me as well.

When I was playing on 0 voidstones and had 1 Favoured map slot I got the preferred map about 8 times from 10 when playing.

Right now I'm on 4 Voidstones, 11 Favoured map slots (missing Feared) and it feels like I am unable to get a single map dropped from "killing". I can get 1 map drop from the map boss sometimes that can duplicate from my Atlas passives, but nothing else. I tried crafting Treant Horde + map drop parts in a t16 Archnemesis and I got ~20-30 maps dropped but almost none of them were t16(with 4 voidstones socketed). Might just me being without too much sleep but it pretty much feels like Favouring maps has a negative effect.

I tried adding maps in favoured slots and it didn't work. Some of these are:
mesa, defiled cathedral, haunted mansion, atoll

Bug report ref number 301 676 333

I find it very disturbing that this is not even listed as a bug since from how it looks many players realised there is something wrong. Makes we wonder if it actually works like it's meant to be because then it's something very cursed