The problem you are describing could be caused by foam in the antenna connector, but also sounds a bit like a software caused error on the Rx, that is not sending back any data
Which setup do you have? Dual motor? Did you make any changes in the code?
Mono motor on a towboogie. No changes in code other than the configs/setup.
The E4 is shown most of the time. On startup it takes a while for it to connect, about 5-10 seconds, but it always connects. Ive had wipeouts where the throttle is unresponsive after but after powercycling 1-2 times it connects and I can continue.
Is there anything you know I can try to verify/debug if its a software issue?
You can try to configure the Rx to servo steering output. Don’t connect anything to the servo output and continue to use the SRV output for your motor. Or do you already have a servo?
No no servo! I have no steering
Ok, then please configure the Rx to Servo steering and check if that helps
Ok thanks will try. But to clarify I should try adding a resistor just the same as I would use a servo? Like the wiring diagram on GitHub?
Or only in software?
Only in software, no changes to hardware needed
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Will try and report back thanks for you help 
Is there a DIY friendly way on this or the V2 pcb to connect a different trigger signal?
A generic 0-5v or 0-3.3v signal for example.
You would need to desolder the hall encoder (the “lonely” component on the top end of the coffin shaped PCB. There you can attach a 0-3.3V signal
Yeah, I do not think so.
With my soldering skills, that is pretty unlikely to succeed.
If I find some time, I might get a HT-CT62 development board and try it that way.
Thank you for the quick help.
Tried changing rx config to enable servo but no difference. Had a session today, Continuous E4 but have connection throughout the whole ride. Foil battery has never been shown so maybe something with the telemetry connections, Will have a look tomorrow and see if cables are bad or solder joints.
Any other ideas I can try?
The behavior you describe means that the remote sends data to the Rx but does not get any data back
This sounds like a problem with one of the radio modules or their antenna. So most likely is foam inside the TX connector after all
This is the unlocked symbol
If this does not disappear automatically the toggle or trigger are mis-calibrated, please calibrate again