I'd also like to chime in and say I have noticed this issue, spoken with Microsoft support online, and in person at a Microsoft Store, and nobody has even heard of it.
I was able to reproduce the issue on the Surface Pros in the store, although surprisingly the Surface Pro 3 did not seem to exhibit the same behavior (though I was only able to test it on one Surface Pro 3, because there were quite a few people using them.)
I wish Microsoft would be more forthcoming with details about what the problem is with this issue, and if/when they think they might have a solution. This issue has been around for months with no updates at all. Maybe we're not just complaining loudly enough.