Do you guys find the X4R-SB RX Receiver losing signal when it's placed too close to the Taranis? (say within 0.5m).... or is mine just defective?

Taranis is definitely working fine as I have been using it with D4R-II.

I also tested RSSI values around the house... reading from the X4R-SB is about the same as my working D4R-II... but it just constantly shouting "Telemetry Lost" as i get too close to the RX.. and it does lose signal and triger failsafe as well. I was running the motors with moving throttle (props off), and the motors stopped responding when it says "Telemetry lost"...

Anyone else experienced this? 

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Responses from MI Group:

Yes, constantly. I've heard explanation for it as "Fresner Zone" or a firmware bug. Signal is not actually lost, Taranis shouts that message but it is all good.

Ok, so we need to be careful if it losses signal while being too close. That Fresnel zone applies to X4R because its different signal characteristis (can't specify now) In real life it is quite frustrating when changing prop for instance and while quad is close to the radio it shouts "Telemetry lost" all the time https://en.wikipedia.org/wiki/Fresnel_zone

I never encountered the problem while props were spinning. I remember once actually quad was armed, props spinning and it was false alarm although RSSI was going down on the telemetry screen very rapidly. This is a weird issue

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False alarm for me.

If you arm your motors at low rpm's and have failsafe on your taranis, put radio close to quad and you'll know for sure. I had tested that out a few times on different quads

I have the same issue. "telemetry lost" i don't think I actually lose command of the rx. I thought it was from being next to two wifi routers in my house.

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all the time! it's a bug

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Similar on mine. I thought it was normal. But later I changed out the board of the taranis (for some other issue) and this problem went away. Not sure if it's the x4r or the taranis.

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This issue exists with L9R, X8R and X4R (and probably all other X-series receivers). Strange that people say that this is false alarm, in my experience it is not. When testing rudder surfaces on a plane they moved very intermittent and jerky. Moved the Taranis 2-3 meters away and all was silky smooth. I always recommend people have motors off and disarm as failsafe, so no real problem, just merely a nuisance

It's normal for all tx and rx. It's called swamping, the power of the tx drowns out the rx. You want to be 3-5 feet away.

Happens to me too. The Rx is designed to be very sensitive and that's the equivalent of screaming into its ear, so who knows, it might even be a protection circuit.