Peter is aware of issues with the %FinderSelections% token, I reported it yesterday. The other tokens may be a related issue.
Long story short, he made adjustments to the underlying code that those tokens use to prevent it from running for longer than 0.5 seconds. So with a large number of items, it doesn’t finish completing before it times out. He may adjust it with a future update.
See my topic below ↓
Possible Bug: %FinderSelections% Token Returns Inaccurate Results When Selecting Large Number of Items - Questions & Suggestions - Keyboard Maestro Discourse