I must say for the price of the Tracer900 Gt it's way above the competition. Fully ajustable suspension made the deal for me let alone heated grips, quick shift, TFT, slipper clutch & ride modes.
For what you pay this is not normal. I would pass a message to Akrapovic & send them the photos they will replace the pipe. Once you have default welding like this the problem will never go away.