Master cylinder?? Issue.

Not discounting this reservoir reversal or whatever your master is doing or not doing. Your front brakes not releasing, take a look at your distribution block. Had this happen to my rear brakes this past summer, had to get trailered home. Wish that I had never replaced and threw away my old nasty looking block. The new replacements are trash, my opinion. If you have replaced one, did you have issues trying to get your lines to seal ? The internals look different, they may do the same thing, but they look different. I believe that I had a seal failure, got another new one and couldn't get the top vertical line to seal, port was done at an angle. Got a third replacement, it looked worse than number two. Took the guts out or number two and put into number one. Haven't had an issue with things since, but I am waiting. As RRR says, Chinesium? I don't know who manufactures the block, but their machining is terrible, the nipples inside the ports of the ones I have, are not finished properly, another reason for leaking lines. The next time I have a failure, will probably throw the master and distribution block and go aftermarket.