iv experienced this on occasion the past few weeks
my ping will rise when iv experienced some sort of clipping in either a buildable asset or part of the map
i had a situation where my ping rose to 200 from around 90,i just built a repair station and the sandbag portion of it must have been in me as i built it, even thou i wasn't stuck my ping went to 200, i simply unbuilt it a bit and rebuilt it and my ping stabilized again.