Running on MacOS 10.15.6, have observed this issue in Shotcut versions 20.6.28 and 20.7.11. I insert an item onto the timeline, but when scrolling using the two-finger gesture on the touchpad, it will select and drag the item under the cursor and move it around, either forwards and backwards or to another track. It doesn't do it every time, it appears random as to when it does or doesn't. v20.04.12 does not exhibit this behaviour.
Running on MacOS 10.15.6, have observed this issue in Shotcut versions 20.6.28 and 20.7.11. I insert an item onto the timeline, but when scrolling using the two-finger gesture on the touchpad, it will select and drag the item under the cursor and move it around, either forwards and backwards or to another track. It doesn't do it every time, it appears random as to when it does or doesn't. v20.04.12 does not exhibit this behaviour.