To unattact is not normal. On an bucket that I added a QA to I had this experience. The bottom of the bolt that latches the implement to the loader was not hitting the piece of metal (around the opening), that is supposed to hold it there. I had made it about 1/2 inch too long. Easy fix.
I have beett the heck out of this bucket, digging, uprooting trees etc., and it has never become unattached.
The attached pic shows two things. One - the type of grapple I have. It is very strong. I can lifted a full load of 16' logs, (softwood), and load them for trucking. I use loaded rear R-1's and the rear gets light, but I am not goin' any distance. I don't raise it high until the last moment.
I purchased this type because I thought it would be the versitale for me. I intend to make a work platform that will fit on the forks. The grapple arms will be strong and stable side rails. Another use I envision is to acquire two more forks, (the salvage yard is on watch for me), and with four forks it will make a good brush/whatever, rake and transport. I use it for brush now and it is amazing the amt. I can get on it. As I load I compress the pile periodicly, with the grapple arms.
I have also used it to add lots of material to a burning pile. Each load was like a commando raid. Had to consider the height and width of the fire burning, wind etc. Then raise high make a run toward it, get over the fire, dump it on, and reverse the heck outa' there before I get caught by the enemy/flames. Kinda makes your heart beat a little faster. It is fun to see how large a load I could dump cleanly and still escape unscathed. It really is fun...I mean it!
The second thing the attached pic shows is how mine did come unattached as I was building a burn pile. The reason it got this way is because the operator forgot to put the bolts down to hold things together. I gave him a pretty good talking to. It's kinda funny, he only shows up when something goes wrong...