I also had this problem, multiple creatures in play with counters, random ones couldn't outlast (definitely not summon sick). Also, the attached log is when I had a cat token in play without a counter that COULD activate outlast, once I put a counter on it with another ability it lost the ability to outlast.
I also had this problem, multiple creatures in play with counters, random ones couldn't outlast (definitely not summon sick). Also, the attached log is when I had a cat token in play without a counter that COULD activate outlast, once I put a counter on it with another ability it lost the ability to outlast.