Does anyone have a debunk for eucharistic miracles?

Recently was told by a Christian to look into eucharistic miracles.

These are when the bread and wine at mass literally turns into flesh and blood.

Apparently these were tested and found to come from a living heart with AB Blood. And all the sources I find list them as verified real.

I can't find any contradicting resources.

So I'm wondering if anyone has one. Cause this just doesn't smell right. The Bible is a self contradicting mess and prayer has already been shown not to work, but somehow God saved his real evidence for randomly trolling priests by turning wine into blood?

I don't know about that one.

I will confess most of the resources I found covering them were Catholic in origin, which are hardly trustworthy (another reason why I'm not buying it)

Anyone here more adept at googling shit who can tell me how this is bogus?

Don't get me wrong. I'd love for God to be real but the paranormal has an atrocious track record.

Edit: Apparently it was a bacterial fungus. Thanks for helping me figure it out.