In the attached replay the top air player goes on the telemazer to try and save the day for his team.
He starts by attacking my rock players base. He then teleports to the rock players anti-nuke a little further north from his position, kills it and starts a teleport jump out to attack my air player. The air player is sending mercies during this time. If you zoom in you can see the mercies break into shells, he jumps, and those shells track him across the map to his new location. This first time they vanish after 20km so they don't reach him.
The second time is when he jumps from that new teleport position right into the air players back base. This time the mercies that broke into shells track him all the way across the map, don't vanish and reach him taking off hit points. It made no difference to the outcome of the game as there was a vast wave of mercies that then got him regardless but still.
With cybran t2 subs something similar happens. I think the bug is to do with homing shells and when something teleports they keep homing. While homing torpedos do seem to vanish after a while if you watch the direction they're travelling in you can make a pretty good guess where to send your strats or torpedo bombers to snipe him.