[fix] Sagas don't trigger their abilities at the right time

[Aswan jaguar]

Describe the Bug:
Sagas don't trigger chapter abilities at the right time.
When a Saga enters the battlefield and gets a lore counter the chapter 1 ability doesn't trigger. It will trigger next time it will get a counter so all chapters go one turn later and as a result the 3 chapter never triggers as the card has been sacrificed previous turn.

Relevant Rules:
As a Saga enters the battlefield, its controller puts a lore counter on it. As your precombat main phase begins (immediately after your draw step), you put another lore counter on each Saga you control. Putting a lore counter on a Saga in either of these ways doesn't use the stack. Each symbol on the left of a Saga's text box represents a chapter ability.
A chapter ability is a triggered ability that triggers when a lore counter that is put on the Saga causes the number of lore counters on the Saga to become equal to the ability's chapter number. Chapter abilities are put onto the stack and may be responded to.

Which card did behave improperly?
saga mechanism

Which update are you using? (date, name)Which type? (duel, gauntlet, sealed deck)
March 2020 - Allegiances and Alliances, duel

What exactly should be the correct behavior/interaction?


Are any other cards possibly affected by this bug?
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[drool66]

Confirmed. It's because of cec0735 where I moved XTRIGGER_REPLACE_COUNTERS to the beginning of add_or_remove_counters_impl(). I'm pretty sure this is the only thing that looks for it, so I'll try to figure out if it's better to move the trigger or change how sagas work.

[EDIT] Fixed by changing how Sagas work in ad60aa7. Nothing now looks for XTRIGGER_REPLACE_COUNTERS