Oh my god! I've been facing similar issues with my Ikea chair. Initially, I thought the reason behind it was the ungrounded sockets in my room.

Whenever I try to move the chair after standing up, it's always a bit of a gamble whether I'll get a shock or not from touching the back-leaning part. It's become a bit of a game for me, in a way.

However, since this chair has already given up on me, I'm considering buying a new one. It's reassuring to know that I'm not the only one dealing with these problems. 😆