Sometimes I noticed my stamina completely restoring an amount similar to how much I just recently spent after I reload the game as if it was like a rollback. Like say I run and finish a 80 stamina, refresh the browser, and I somehow get that 80 stamina back out of nowhere.

Has this happened to anyone? It's not very often but it's often enough I've taken notice of it.

Think of it as a "stamina rescue" feature for players who experience a legit browser crash in the middle of a mission.

It won't work anyway after some time, but regardless, don't abuse it.