Sorry SE, but endgame won't work if you don't fix something.

[Jamal]

Do the running Esuna or mount chocobo test (autorun on, just keep casting the said spell) at any time you want. You'll notice the spell always casts at least 50% no matter when you tried this, so it takes about 0.5s before your client realizes you can't cast a spell while running even though the action is actually impossible.

Atleast 50%? Man I get consistently to around 0.30-0.10 seconds left of full 1 second cast before it interrupts. In fact yesterday was abnormally laggy and I managed to actually run and mount without interrupt. Every now and then the run and mount caused a 90k.