I have an LHT65 transmitting temperature every 20 minutes. I also have a dragino LPS8 gateway. I can see join requests and uplinks in the gateway and the end node on TTN V3 console, and I also receive the data in thingspeak.
When I have the LHT65 sitting on a table about 5m away form the LPS8 it seems to work fine. As soon as I move it up about 1m and backwards about 2m onto a shelf (but still about 5m from the LPS8), the data is only received very erratically, several hours between uplinks. (see figure). If I put it back on the table it does not recover, unless I force it to rejoin. I get the feeling that the occasional successful erratic uplink is being received by another distant gateway and not my own, but I don’t understand why it does not revert to my gateway when I move it back? Maybe it is somehow in a blind spot on the shelf?
I have read another case on the forum of similar erratic behaviour of an LHT65 where the owner gave up and binned it. I will try updating my firmware on the LHT65 (from 1.6 to 1.8) before I do that, maybe that has something to do with it.