KDE Connect has been slightly buggy for me on kubuntu 21.10.
While receiving big file from android its throwing error after file is sent, and my android phone is indeed showing that file is sent but pc shows that file is incomplete.

This issue is not arising when file is say 500 MB that I tried.

THIS IMAGE SHOWS THE EXACT ERROR
https://imgur.com/a/8KVjrQq

THIS ONE IS SHOWING WHAT ITS SAYING ON ANDROID
https://imgur.com/a/RXGiAlE

Here is my kde connect version on linux and on android its latest 1.18
https://i.imgur.com/FlP33xX.png