This is a question as opposed to a review: suppose an investigator controlled the custodian and then lost control of it in Act 3a. Then for the purpose of Act 2b (and the scenario resolution), is it true that the investigator "has performed" the "An investigator controls the Custodian?"

To be clear, I think this is different from Act 2a, where it states "if three of the following are true..." and when you lose control, it is no longer true that you "have control". However, given the way the game resolves the number of tasks in the resolution of the scenario, it seems it expects the number of tasks you have "performed by the time the scenario ends" (as opposed to, say "to be true by the time the scenario ends") to be definitely between 3 and 6, and you can get into a state where you only have 2 tasks (by doing the Custodian and 2 other tasks, then losing the custodian), which is not given a consequence in the resolution.