PyCharm virtual environment (venv) issues?

[j.crater]

I have noticed multiple mentions of issues regarding virtual environments in PyCharm.
My use of PyCharm didn't stretch much beyond a couple of relatively simple projects, but I have not faced any kind of particular problems regarding venvs.
Could those of you who had encountered such issues explain more specifically what was going on, so I know what to be aware of, or avoid in the first place? Thanks.

[Larz60+]

I can't remember exactly (I have trouble remembering where my coffee is), but If I recall correctly, if I had several projects that I was working on at the same time, and I switched from one to another one, The interpreter often wasn't the one in the current environment, and when I tried to change to the proper one, I wasn't allowed to do it. I did place a bug report with jetbrains, so it may have been corrected by now. Other that that, it worked fine.

But now, I'm hooked on VS Code, so doubt I'll go back.