GPS problems?

[RedRocket]

I'm sure you must be aware that anytime you're in BLUE LED condition the system is in active "Defense mode" for all Transponders.
The conditions described does sound like you have an intermittent connection somewhere in the wiring & are you sure all Connectors are 'locked' into there corresponding slots.

I do not use ALPConnect or BT & am not familiar enough w/ set-up to help you.

p.s. - there's another Forum w/ far more daily activity & lotsa "geeks" w/ helpful knowledge !
https://www.rdforum.org