They are fairly large cells. I assume the “bad” cells are displaying some maxima-based aggregate rather than implying the whole area (or a large part of it) in them is noticeably jammed.
Also, the reports are coming from aircraft which have a much larger horizon at altitude. The jamming from Kaliningrad probably doesn't have any effect on the ground at long distances.
Turn off WiFi location in your phone and see how long it takes for it to get a GPS fix, or if it never gets one.