I've found that sometimes it help to just dump it into a beaker to heat, then filter into a clean vial.
It may just have been made wrong, and won't hold without added solvent. I've had to add bb, reheat, filter. But you then run into the issue of possibly not knowing the concentration. I guess if it's supposed to be say 250mg/ml, then just figure out how much bb to add to make it 225 or 200. Then heat/filter.
Some short esters or high concentrations are more difficult but the basics should hold easily and if not, likely werent made correctly.
I wouldn't use it until it holds. If it goes clear, then crashes a short time later, it will do the same post inject by coming out of depot and crystalizing in the muscle causing pain.
Maybe someone else will have a better idea for you but this has been my experience.