I'm assuming you ruled out loose bulb. That will also allow the txv to run wide open
Those are the three things I know to cause a txv to flood a unit.
Mind you these are all commercial A/C units. Just figured out that I had wondered into the refrigeration section.
How likely is it for dye to clog up a small opening like a equalizing line or equalizing port in an internally equalized txv? I think that is the real question.