Avengers: Endgame introduced time travel in the MCU to fix Thanos's snap
Endgame said changing the past wouldn't affect the present
In Loki season 2, Loki's time troubles challenge this rule
Loki's past actions seem to change the future, going against Endgame
The TVA operates with different time rules, which could explain the change
The multiverse and TVA changes could also affect time travel rules
Marvel needs to make its time travel rules clear as it enters the Multiverse Saga
"Loki" playfully teases "Endgame" while acknowledging its importance