Post fermentation coloring with caramel

Commercial beer coloring (left side)
Blue Mountain Country food coloring (right side)
The srm or color isn't of interest  ( I used different size tinctures), this is a more a test to see if the coloring remains in solution or precipitates.
In water with an hour rest

Both water soluble

In beer with an hour rest.

The resulting compound for Blue Mountain Burnt Sugar is insoluble

And after another 1/2 hour.

insoluble precipitate

Something is making the Blue Mountain Burnt Sugar coloring precipitate out in beer. Uh, it looks like mud. The commercial coloring is still brilliantly clear.

I will perform the test with some home made caramel and update once I get a chance.

The base beer is a vienna lager about 5 srm.