Hello. First of all, thank you for your affirmation of the quality and workmanship of the bag. Regarding your report, please note that if you don’t put some items or carry a computer for support, it is really difficult to achieve a perfect shape in backpack mode. This is indeed a defect. But please also understand that this is an unavoidable contradiction in order to switch between a sling bag and a backpack.
Fortunately, we are a small team, and as such, we drive ourselves hard to continue improving the design. We will try to modify our existing design in the near future, and we look forward to solving this problem in future versions. Finally, thank you again for your feedback.