Pathfinder’s Alchemist’s Boon Casusing Buffer Underflow

Hi GGG,

I would like to report a reproducible Buffer Underflow crash related to Pathfinder’s Alchemist’s Boon.

## Summary

When a Pathfinder has Alchemist’s Boon active, affected allies can crash with Buffer Underflow when they change areas, die, revive, or are recreated.

This does not only affect party members. It also seems to affect minions or other allied entities, and the issue appears more frequent with minions because they die and respawn more often.

## Reproduction

1. Play with a Pathfinder using Alchemist’s Boon.
2. Have party members or minions affected by the shared flask effect.
3. Let an affected party member leave/re-enter the map, die and revive, or change areas.
4. Alternatively, let affected minions die and respawn repeatedly.
5. A Buffer Underflow crash may occur.

## Observed Behaviour

- Party members may crash when leaving/re-entering an instance or reviving.
- Minion setups appear to trigger the crash more frequently.
- In party testing, the crash can often be avoided if the Pathfinder leaves the instance first before other party members transition.
- This suggests the issue may be related to the cleanup or reinitialisation of Alchemist’s Boon’s shared buff/recovery state.

## Expected Behaviour

Alchemist’s Boon should not cause crashes when affected allies, party members, minions, or temporary allied entities die, respawn, revive, despawn, or change areas.

## Possible Cause

This may be related to the interaction between Alchemist’s Boon and Pathfinder’s flask recovery mechanics, especially Enduring Elixirs.

Enduring Elixirs allows Life Flask recovery to continue even when unreserved Life is full. If that ongoing flask recovery is shared to allies or minions through Alchemist’s Boon, the recovery state may remain active on allied entities.

When those entities then die, respawn, despawn, revive, or change areas, the game may be trying to clean up or restore a shared flask recovery state that has already been removed or is no longer valid, causing a buffer underflow.

This could explain why the issue is more common with minions, since they are frequently removed and recreated during normal gameplay.

## Temporary Workarounds Tested / To Test

- Have the Pathfinder leave the instance before other party members.
- Disable Alchemist’s Boon before allies change areas.
- Remove the Alchemist’s Boon support gem and wait for related buff icons to disappear before area transitions.
- Avoid using Alchemist’s Boon together with frequently dying or respawning minions.

Thank you.

+fix