[Pillar effect echo] the red area is placed outside the clip.
Yep, this can be solved manually but require a little bit of precision and probably is an issue.
i created a project using 1080p 30fps (landscape) after that i placed a portrait clip ( 1080x1920 ) taken from my phone using it vertically. (most common clip i assume)
after placing the clip on project bin i rejected the Kdenlive project-resolution change (to be sure the final rendering will be landscape)
and when i apply the Pillar echo to the clip the red squared box (to trim edges) is placed not perfectly "around" the vertical clip.
here a video: