Yeah... that's not right! You should not be getting failsafes like that, and it can only be one of 4 things.
1. It could be that the TX board in your transmitter is damaged, this can happen if the radio has a removable antenna, like the X9D+SE model, some will turn the radio on without the antenna and the damage is done, no maybes about it.
2. It could be that the antenna(s) have come off the Receiver.
3. It could be the Receiver is bad.
4. It could be that BF is not configured correctly. The reality is that you are always having short lapses in your comm link, usually they are too short to notice as long as BF is configured for .4 (BF default) or as I like to set it based on JB's video, .5 seconds, before an actual failsafe occurs. Given the way it is acting for you, it is possible something as simple as the Failsafe Tab, Stage 2 settings may be wrong.