why does it matter so much? Iirc the 30y bond has average tail or average stop-through around 1.5bps, which really is a fraction of daily vol, a third of a standard deviation?
Well, you could argue that it's your only instantaneous indication of actual investor demand... So, of course, mkt participants extrapolate, rightly or wrongly. This happens regardless of the context, such as you mention. Whether it makes sense, I couldn't possibly tell you.