I've done stand developing for quite a while, and have never faced a bromide drag problem. I find the solution to be thorough agitation, when you do agitate.
Following a pre-wash, I agitate well for the first 10-15 secs. of development, then again halfway through the hour, then just a bit just before the timer goes off at the end of the hour and I start to pour it out.
Mind you, stand development is not a substitute for "proper" developing. I use it to tame high-contrast, sunny scenes only, since by nature it does tend to flatten out the contrast (which is the whole point of stand developing anyway).