I do not think they are comparable, the shimano trail has a constant% support (low, medium or hight up to 70nm while the bosch has a% of assistance which varies automatically from 110% up to 300% in emtb mode...
I also had the same problem with Decoy pro race 2 times, and since everything is fine, I connected Etube with the box pce2 he did not find any error, ... to follow.
you have to use the shimano tool to connect the connectors, you will hear a little click when the connector is plugged in. check on the manual, that the connections are correct on the display, on mine there was a reversal of the wires between the assistance and the shifter
I think it's still a small structure and they respond in priority to those whose delivery date is exceeded, they can not spend their time answering the concerns of those whose delivery date is expected in two month, until now, delivery is made within 3 months after ordering info mine is...
hello from France, I ordered the prorace in M on April 10 and deliverable July 10, I look forward to a sign of YT, knowing that orders on the same date are being delivered