Helium recently pushed a new update to the network. It seems they’re now starting to punish people “spoofing” the network with fake locations on their miners. It will also start rewarding miners based on actual coverage rather than how many witnesses the miner can speak to. It makes sense, but at the same time it’s just another rushed change that probably should have been implemented ages ago when some areas weren’t completely saturated.
Up till now, antenna setting in the helium app didn’t do much. From v11 onwards, it will change the transmission power of your antenna. So if you have an 8dbi antenna, ur transmission power will be greatly reduced. It’s healthy for the network and probably should have been implemented earlier.
Full changes here