This is a VERY common problem.
I don't own one single piece of gear that uses the square USB Type B connectors that hasn't had a problem. As far as connectors go it's a bad mechanical design. I've played with cables and even yanked out old jacks and put in new ones that from the get go were just as bad as the old ones. Unless the pins are busted/flattened/lost tension changing the jack doesn't do anything.
Yes ... the plug (male) locks into the jack (female) ... but that doesn't solve the problem.
There are 2 basic problems ...
1) Excessive side/side and up/down play. The jack simply doesn't fit the plug well ... and it's universal.
2) The width of the 4 plug conductors.
I've found no differences in jacks (female) but all plugs (male) are not the same. The exterior metal section is the ground and some are long and some are short ... the difference is about 1/8 inch. Long ones wobble around more than short ones because they don't seat as well in the jack ... about 1/8 inch of the metal ground sticks out past the surface of the jack. I've had long plugs that when fully locked into the jack can still be pulled in and out about 1/8 inch with zero resistance. This lousy fit lets the jack dangle down at an angle and/or be pulled to the side and it's so wobbly that even a slight movement of the jack can result in loss of power or data to the equipment. The shorter jacks are only slightly better in this regard but the fit is still lousy and they're only just slightly less prone to dropping connections.
I've seen two styles of the 4 conductors in the plug. Some are a little skinny and others are slightly wider. It's a subtle difference but when you can see the plugs side by side the difference is apparent. The plugs with the wider conductors are less prone to dropping connection due to the lousy fit.
Paying attention to these subtleties when you buy your cables can help with the problem ... but fact is ... the square USB Type B jack to plug fit will still be lousy. Once dropping connection becomes too frustrating about the only thing you can do is jam something into the gap to tighten up the fit or ditch the square USB Type B scheme for something that fits tighter. Replacing the Type B jack will buy you time if you're lucky but will not fix the problem.
