Help! TranzX Bike weird behaviour, showed error code 1 and dissapeared but now whirring and pulsing, Pedal assist doesnt always engage.

[wojtek30]

My Raleigh Forge I have got has now gotten a weird issue where It makes a whirring sound and the engine doesnt always engage.
Here is a video of it: https://youtube.com/shorts/7D9cz8vW4_8?feature=share
The bike worked flawlessly for 50 miles and then I left it for a week and now theres this issue.

I have tried to reseat the external motor connector to no avail, battery voltage is ok.
I am using a normal 36V battery not the original tranzx one, this didnt cause any issues before.

 

[AGS]

It could be a brake sensor issue. It looked like it worked ok until you pulled the brake lever and then pas stopped engaging.

 

[wojtek30]

It could be a brake sensor issue. It looked like it worked ok until you pulled the brake lever and then pas stopped engaging.

Unfortunately its not just the engaging, the motor lurches forward sometimes and makes a horrible whining sound and sometimes loud clicking which can be felt in the handlebars happen.