Unfixed

The monster again became an islet, rock, or reef, but a runaway reef, unfixed and elusive.

It was best to use unfixed cells permeabilized in the presence of glycerol and/or low taxol concentration to prevent microtubule depolymerization.

That bug had gone undiagnosed and unfixed for several months due in part to the difficulty of reproducing the problem […]

There is no general, unfixed problem of exclusion as such, only specific instances with specific causes, which can or cannot be cured by specific means in this or that instance.

Examples include an honest roulette wheel or, at the bottom end of the category, an unfixed horse race.