iOS Fast rate of fire troops missing attacks due to server lag?

If a troop has been placed on the map, your connection to server is irrelevant after that, the troop will attack even if you lose connection. Also, if we say Supercell server faced a lag (which as far as I remember never happened before) The whole troops will lag not just your troops. The only explanation I can think of is re-targeting time. Let me explain. If witch locks on a target, it will take 0.2 seconds for witch to hit her first attack. If before witch start attacking his target (in that 0.2s) the target die (from attack from other troops and in more common cases attack from arena tower), the witch needs to find another target and after that there's another 0.2s delay. This is a known phenomenon specially with slow attacking troops where one troop may not attack for a short period of time (because it's constantly changing its target) This how the game works and all troops have this mechanism (the numbers for each troop is different). If you still have that match in your log, you can check the replay.