Solid tool. But on Windows it has a tendency to freeze and remain unresponsive if you leave it open without using it for an extended period eg overnight.
Author here. This was never reported. I haven't noticed it for myself either. Feel free to get in touch through the official email (mentioned on the homepage) or through GitHub issues. I'm in the process of polishing 3.4.x branch, eliminating as many bugs as possible, before focusing on 3.5.0.
Then report it via the appropriate channels with as much detail as possible and steps to reproduce. It looks like you are complaining without having even used the software.
You'll have to stick to pen and paper, although pens stop working if you don't use it for an extended period of time, so I guess it's an obvious defect with the product and you shouldn't use it.
Edit: I apply the same rule to FOSS, of course. If it can't idle or if it freezes up or crashes sporadically or whatever I remove it. I'm old, I don't have the patience for stuff that breaks without good reason.
It's a minor annoyance