When adding a same track transition Kdenlive 21.08 with MLT Version 7.0.0 works like this on a freshly installed manjaro:

Hard cut from clip 1 to clip 2 -> soft transition from clip 2 to clip 1 -> hard cut from clip 1

Expected behaviour: A soft transition from clip 1 to clip 2

I also made a short clip showing the wrong function of same track transition: https://tube.tchncs.de/w/cdNAdKcLoFFv5EGzxerqR9

Operating System: Manjaro Linux
KDE Plasma Version: 5.22.4
KDE Frameworks Version: 5.85.0
Qt Version: 5.15.2
Kernel Version: 5.13.12-1-MANJARO (64-bit)
Graphics Platform: X11
Processors: 8 × Intel® Core™ i5-8250U CPU @ 1.60GHz
Memory: 7.6 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620

i'm not able to reproduce on latest nightly build for Windows, it's necessary a Linux feedback.

it's solved in 21.08.1 in Linux, according to the [url]KDEnlive-News[/url]https://kdenlive.org/en/2021/09/kdenlive-21-08-1-is-out/