Weird dropout once bottled

[koniowsky717]

recently bottled a traditional mead that was crystal clear when bottled.. about a week later, it became cloudy with a strange blackish sediment. everything was sanitized prior to bottling, and even cracked one open to try and it taste fine.. just used wildflower honey, water and d47 yeast with staggered nutrient addition. attached photo -

 

[bushpilot]

I had one do that, and I don't know what it was. It aged fine and tasted great.

 

[koniowsky717]

I had one do that, and I don't know what it was. It aged fine and tasted great.

Im sure its gonna age fine after tasting.. Im just trying to find out how it happened as noone else is gonna want to see black sediment in a bottle lol.. first batch I backsweeted .30 points, and just more fallout after bottling? lost on the black part

 

[bushpilot]

Mine wasn't backsweetened at all.

It sat the the secondary, on oak cubes, for 3 months before bottling. Was super clear when bottled, and then eventually dropped black fines. I am guessing in my case it came from the oak.