Reaper 5.20pre4 OSX: Shift + ALT Modifier doesn't work

[vanhaze]

Hi !

- Reaper 5.20pre4 - OSX 64bit.
- Mouse Modifiers: (SHIFT)+(ALT) combi assigned to an action in the context Left click - Media Item
- Mouse Modifiers: (SHIFT)+(ALT) combi in context Media Item bottom half is passed through.
-I left click on an Item, while first holding (SHIFT)+(ALT) combi.

Outcome: nothing happens ; the assigned action isn't executed.