I have installed "cinnamon-desktop-environment" on Ubuntu 20.04 LTS Desktop 64-bit.
I am attaching a video in which I open any dropdown menu. Any dropdown menu of any application suffers the same problem:
I also tried on Linux Mint 20.1, same problem. If the click is very short, the drop-down menu remains open, if I hold down slightly more and then release, the drop-down menu closes.
How can I fix it?
I just experienced the same problem and was able to solve it with the following steps:
The menu now opens when the mouse hovers over it. I prefer to click to open but there doesn't seem to be a setting for that.