The expected behavior is that all tokens on all three lines are flashed. That is the behavior I get when I try this as well.

Let's break down "flash every token line"

1. no mark specified. Start at selection.
   For each selection:
2. line. Expand to line
3. every token. Use every token
4. flash: Flash final targets

Sorry, I miswrote my original message - I was saying 'flash every token this'

That is own purpose, but might be a bit esoteric. The idea is that if you have a single scope selected and issue and every we ignore your current selection.

Code:

Example test case:
https://github.com/cursorless-dev/cursorless/blob/3e8473a193f775bc3d0a763b4a1f21356b8b1746/data/fixtures/recorded/modifiers/everyScope/clearEveryToken.yml

When you only have a single selection this logic make totally sense, but the behavior with multiple selections is a bit unexpected. @pokey How do you feel about different behaviors depending on if you have one or many input targets?

Yeah I've always had mixed feelings about that heuristic. Multiple cursors is not a terrible idea for when to drop the heuristic, tho do we have that information easily available at the modifier stage?

Not today. This would be a change to pass that additional information.

For what it's worth it does seem to preserve the selection for the first set of cursors and only ignores the selection for the last one (which agrees with your description above, but is definitely a little bit odd- as an experience)

Yeah that is not good UX. Here is a fix
#2893