Unable to repair damaged tank in arcade mode? Bug?

Weird bug, my tank took a hit to the engine, no crew hurt (at first) but every time I tried to repair the damage the progress bar would just looped around and reset, tried for 2 minutes straight before having to suicide the stricken tank.

I think having friendlies nearby that were also damaged the game was confused with assisting other tanks that were damaged?

It not a bug however it you need to research the modification called “improve part” and don’t move your tank it will repair it self automatically but it will not work so well… or just pray for your allies coming to help you.