Yesterday evening on Mareth, we, as British, capped Mareth flag, allowing the Axis to have their Tiger. But then we pushed through Gabes and capped the two flags.
First, the Tiger spawned at about the same time we got Lower Gabes. I thought that this was due to this dummy flag called "Axis heavy armour reinforcements" and that the countdown for the Tiger, once started, had to go to the end and make the vehicule spawn. I quickly mined the Tiger and the Panzer IVF2 that was also here and got two kills one or two minutes after this action.
Since the Stuka was still in the air, I went to the airstrip and repaired the Vierling, waited a bit until I eradicated the Luftwaffe and left.
At this moment, I saw it and was like "what the f...?". The Tiger and the Pz IV had spawned again ! The two Gabes flags were British and we did not loose them at any time during this story. I made some screenshots since I assume it's not really wanted.
As far as I know, these spawns are due to this dummy flag. However, it seems that the German team doesn't loose it when British cap Gabes, allowing the tanks to respawn in their base. Maybe you should had another condition for the Axis to have this dummy flag so that the Tiger won't appear if the British hold Gabes, but I don't know if it's fixable.