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@Gordon
Great! Glad it's had some effect - the signal strength is a tricky one - I guess if lots of bluetooth devices are broadcasting that could cause a lot of interference.
2.4GHz is really bad at going through people too (it's basically microwave frequency, which just gets absorbed by water), so it does seem odd that it has any effect at 1m distance, but I guess if you end up in a situation where the signal has to go through your arm and your body, and there's interference, maybe that's just enough to push it over the edge sometimes.
I think with radio there will always be occasional cases where the connection drops out, but it should always be able to reconnect - it was really odd that it just kept failing for you before.