The crashing occurs only for my most frequently used tank, which I upgrade its components to high component levels. The components involved in the crash are only the most upgraded components of each upgrade slot - one component for every upgrade slot - of which I use battle points to buy level 1 components to further upgrade the existing component(i.e. to level 4/5), which are labelled with a star(*).
The approach which I use to upgrade the components leading to the crash goes - TANKS, particular problematic and most frequently used tank(i.e. raptor), UPGRADES, upgrade slot (i.e. turret) and finally, specific upgrade (i.e. material extractor) - after which, the application will crash and a pop up saying 'Connect lost. Press 'Ok' to reconnect'. Before the crash happens, I used to go to the upgrade slot page, specific upgrade, select component and buy it's level 1 needed components with 130 battle points each, confirm buy that component and repeat this cycle of buying each component with 130 battle points a multitude of times for that particular component until it is suffice to upgrade that component to the subsequent level. After which, the problem starts and it results in lost connection and I will need to reconnect. This lost in connection will then occur every subsequent time I access that particular specific upgrade (i.e. material extractor) of this specific tank (raptor) and the application will restart every time I access that particular component of particular tank which I use battle points to buy its components with 130 battle points a multitude of times.
Perhaps the developers could try access my account to take a look at this problem for my problematic tank (Raptor) which the problem is triggered for the star(*) specific upgrade(i.e. material extractor) of each upgrade slot.
If any clarifications are need, please let me know!