Hi,
I'm in West Australia and have the first zero in the state. I have a SR Which i got from the eastern states and have been having the same issues you describe. Just this morning I went to get on my bike to go to work and it failed to fully charge last night. Its was @ 80% and would not accept anymore charge. I left for work and 500m down the road the battery dropped to 1% from 80% so i turned around and rode it very slowly back home and put it on charge again. Straight away it jumped to 80% with a loud click(switch sound). I then decided to see if it was OK to ride and left for work. Got to work which is 4km away with 82% charge. My bike seems to generate power when riding
My first charge was similar with a fail to reach full charge as it stopped at 80% too. Ive done 1300km on the bike so far.
Each time it has done this I noticed the phone app indicates battery voltage is 101v @ 80% SOC instead of the 116v you get @ 100% SOC
Something is not right with my bike and the dealers like you mention are not clued up on what to do.
Would love to know more if you find out whats happening to yours