I have also noticed this in circular orbits and also with when the tanker is a carrier recovery tanker. I suspect this is not intended behavior. To be sure, the tanker will still fly a nominally circular orbit (or recovery tanker orbit) at roughly the same altitude, but there are many disturbances now that did not used to be there, for example: small right hand turns (though the overall orbit still is a left-hand turn circle) accompanied by nearly instantaneous acceleration of four or five knots, and also accompanied by a small but quick change in altitude (maybe fifty feet?). With something like the S-3B tanker with its short hose or the KC-135 (boom, not MPRS), it is nearly impossible to stay connected to the tanker when these happen. It is a bit easier with the KC-130 and KC-135 MPRS because their long hoses have more play in them.
On first post-most-recent update test, a tanker on a race-track orbit (but not carrier recovery) does not seem to show these behaviors. So it seems, to me at least, that these happen on circular and recovery tanker orbits.
I understand that circular tanker orbits might not be a thing in real life, but they can be helpful in DCS especially for newer digital aviators who might have trouble trying to end up at a good intercept position for a race-track orbit. But I think the recovery tanker orbit in DCS probably is not all that far off of what might be used in real life. Anyway, even if not particularly realistic, if the capability exists in DCS, I suspect everyone would like it to work well.