Fade In & Fade Out messing up with Corner Pin

[MusicalBox]

Windows 10, 64bits.
Occurred in Shotcut 20.09.27, reproduced in 20.10.31

Look what happens to the Stretch Y parameter (and to the Filters tab) when I apply a Fade Out to the clip.

It doesn’t occur if the parameter is set to the default value though, but it does make the Filters tab flicker.
It affects the Stretch X parameter also if it’s not set to default.
Also occurs with Fade In.

I thought it could be related to this bellow, but @shotcut said this one was fixed:

Filter video fade in and out don't work correct on stretched files in the timeline

This is a nice easy bug to reproduce and I’ve included a sample video of it in action. I’ve seen it occur with images file, but believe it can effect others types also Step to reproduce: Add an image (example.png to the time line) Add the filter “Fade In Video” & “Fade out video” Adjust the start and end time of the image appearing in the timeline via dragging it. (For this example I suggest making the image appear 1 minute earlier and ending one minute later. via dragging it) Export the vide…

[Hudson555x]

Duplicated here.
Shotcut 20.10.31
Windows 10 Home 64 bit
Video Mode 1080p, 60fps
Image size: 1920x1080

[Debug  ] <TimelineDock::dragEnterEvent> true 
[Debug  ] <Timeline::OverwriteCommand::redo> trackIndex 0 position 0 
[Debug  ] <Player::setIn> in -1 out 239 
[Debug  ] <Player::setOut> in -1 out -1 
[Debug  ] <TimelineDock::setSelection> Changing selection to (QPoint(0,0))  trackIndex -1 isMultitrack false 
[Debug  ] <Timeline::AddTrackCommand::redo> video 
[Debug  ] <TimelineDock::setSelection> Changing selection to (QPoint(0,1))  trackIndex -1 isMultitrack false 
[Debug  ] <MainWindow::openVideo> QFlags<QFileDialog::Option>() 
[Debug  ] <MainWindow::open> "D:/Shotcut_Projects/demo 25/export462-00002.png" 
[Debug  ] <MltXmlChecker::check> begin 
[Debug  ] <MltXmlChecker::check> end 
[Debug  ] <Mlt::Controller::setPreviewScale> 1920 x 1080 
[Debug  ] <MainWindow::setAudioChannels> 2 
[Debug  ] <Mlt::Controller::setAudioChannels> 2 
[Info   ] <MainWindow::open> "D:/Shotcut_Projects/demo 25/export462-00002.png" 
[Debug  ] <TimelineDock::dragEnterEvent> true 
[Debug  ] <Timeline::OverwriteCommand::redo> trackIndex 0 position 0 
[Debug  ] <Player::setIn> in -1 out 239 
[Debug  ] <Player::setOut> in -1 out -1 
[Debug  ] <TimelineDock::setSelection> Changing selection to (QPoint(0,0))  trackIndex -1 isMultitrack false 
[Debug  ] <autosaveTask> Function autosaveTask finished in 17 ms.
[Debug  ] <autosaveTask> Function autosaveTask finished in 15 ms.
[Debug  ] <autosaveTask> Function autosaveTask finished in 31 ms.
[Debug  ] <autosaveTask> Function autosaveTask finished in 34 ms.
[Debug  ] <autosaveTask> Function autosaveTask finished in 17 ms.
[Debug  ] <Timeline::FadeOutCommand::undo> trackIndex 0 clipIndex 0 duration 8 
[Debug  ] <autosaveTask> Function autosaveTask finished in 18 ms.
[Debug  ] <autosaveTask> Function autosaveTask finished in 24 ms.

[shotcut]

This is fixed for the next version 20.11