@haeckerfelix huh, thought I'm the only one. For me it's putting the DECT phone back in it's charger or operating the light switch in the room.

Last week I did put my mobile phone under one and it started drawing "scanlines" until I set the phone to plane mode o0

Super sensitive tech apparently. Some are connected via DP. Some are HDMI. Doesn't matter 🤷

No idea about the chair. It's also Ikea but the gas suspension gave up already and I'm still building courage buying a new one 😜