Collection bug by KolSol and Siear® Private

Foreword: Most likely this collection will be banned before I write this guide, but what if!
So *drumroll* I found a bug in the Solana NFT combustion system
Let's explain in more detail.
There is a SITE where you can get Solana for burning unnecessary (often scam tokens and NFTs, these are often sent for advertising, etc.) So, I went to burn scam tokens (of which a significant amount has accumulated in the crypt over a couple of years) and found that for burning this rubbish, I poured a little, but nicely, and I decided to check this case for the presence of an abuse, of course, nothing happened for me in an hour or so (it would be very simple, like you buy nft with freemint and burn it more expensive) after another 50- After spending a minute digging on Solskan, I discovered that a significant portion of the incineration reward came from a specific collection, namely THIS
Why exactly this one?
- I still don’t understand myself, maybe a mistake was made when creating the collection or some kind of bug in the contract, the fact is that after you minted this NFT and burned it, after a while it reappears in the collection as unminted.

What I did step by step:
1. Go here Click on the "Mint" button

2. Mintim 1 NFT (exactly one NFT no more no less)

3. Go to the SITE for burning NFT and connect the wallet on which you have this NFT

After we click on: BURN NFTS - Click on the NFT that we want to burn - BURN NFT (but do not rush to confirm the burning!)

If you are offered to receive +0.010 SOL ($0.2) for 1 NFT, feel free to cancel the transaction

Let's go buy 1 more NFT from this collection and try to burn 2 NFT already

This time it worked and for burning I got 1.2+ SOL (~24$)

I will say right away that sometimes it worked for me only with 4-5 NFTs, but on average it is 2-3 NFTs
After that, we go and mint these NFTs again and burn them until the thread is dead!
TOTAL:
1. Mint nft for 0.2 SOL ($4)
2. Let's go and try to burn it, buy them until we are offered 1SOL+ for burning! on average it is 3 NFT
3. Repeat
Investments: ~12$
Profit: on average $24-28 per round
P.S. If this collection does not exist, then the topic has been covered, and if everything is in place, then abuse ahead! (The collection is being updated, so you have time, don't miss the chance) (Hello solana, who always lags)
Thank you for your attention!