After 5 months since this is posted, is there still no resolution to this issue?
Same as all the others, just picked up a surface dock to be able to use with external monitor, close the lid and guess what? - My WIFI takes a dump.
I have kind of an annoying work around (not sure if it's been mentioned) flip the tablet around, lay it flat with the screen facing up and the WIFI no longer deteriorates.
Any real solutions from Microsoft? 5 Months to fix a known issue just seems too long.