As others have mentioned, it could be user error and you're not actually removing all of the bur. Some steels / burs are kinda tricky and you really have to hone them down and then run them through soft wood, hard felt, or something with a bit more "grab" then cork.
However,
On some blades made out of tough steel with a chip-resistant temper, I have noticed what seems like a fatigued, not wire, edge. This seems happen to edges that have been maintained for a long time with just rods and strops. So, the steel at the edge has basically just been deformed and realigned time and time again without actually removing any/ much of the steel. It will feel sharp, look fine, and not show any sign of a bur when pulled through cork or examined under magnification, but it will deform back out of alignment very quickly when used. It's just been bent back and forth too many times and needs to be removed.
How many times have you fully sharpened it (taken it though a full progression on the stones)?
Another other thing that can happen with knives that are ground and sharpened too quickly using a high-speed belt or wheel is that the thin metal at the edge heats up too hot and the temper is messed up. This can usually be corrected / improved after a few sharpening and thinning sessions as you remove the damaged steel near the edge and work your way up into what was originally slightly thicker material behind the edge which was not weakened in the same way from the grinding heat.
A third possible cause is that your edge angle is just too acute for the steel and it just can't support it for long.
In the ended it could be any 1 or a combo of these things. But the solution is the same no matter what: give it a good sharpening, not just a stop / hone.
Take it to your coarsest stone and take off a bit more steel than you normally would. Set a nice fresh primary bevel and then work up though your stone progression. Created what you know to be is a clean, fresh edge with no bur, and with a reasonable angle (sometime in the range of 25-30deg as the sum of both sides).
Alternately, if you don't trust your own skill, you could take it to a pro (like Pierre, I dont know anyone else in Canuck-land) and request that they do the sharpening (with waterstones) described above. That way you take yourself out of the equation.