Indeed
I haven't a clue whether an easyjet day to Prague would get you your medical BUT when you renew you will have to state you failed in the initial assessment and then went to.....Poland. You cant be criticized for this, but I would expect this to be a red rag to a bull and at best you will be put under the microscope (metaphorically!!) and if you are borderline you may be worse off
In addition you have to assume the nice Polish AME will just think the original crowd are a bunch of incompetents.... what if he thinks they know best.....