Saving the game during escort to Ziguranth

[Max]

Second time faced the following case. I think it is rare, as first time I'd encountered it in ToME v.1.5 or even 1.4. If I'm choosing to betray escort to Zigur, and exiting the game during this active quest, then when I'm loading saved game and accomplishing the quest, it appearing that the award is as in ordinal, not Zigur-betraying quest.

[Cathbald]

Doesn't that only happen if you kill the process rather than exit normally ? I remember some people complaining they couldn't savescum escorts because of that and have never heard of this issue otherwise.