im having exactly the same problem, only difference is my dropped packs is 0% and ping to the sim around 200ms.
Bandwitdht is around 5.
I understand it only will raise if something is being downloaded, but it is that low even on a new sim with tons of things downloading.
I tried now playing around with map, it went up to 500 and returned to 5 or 7 and the sims on map didnt had still its names