what about attached second patch? 

please also test main menu bar > video > atrach effect way.. 

On Friday, August 6, 2021, Andrea paz <gamberucci.andrea@gmail.com> wrote:

I confirm that the patch does not work. The In/Out points do not
create a valid region for "attach effect". It works instead, as
before, for the Drag&Drop effect from the Resources window.

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