Really? That’s completely different to my experiences @lagrian
My LED bulbs just flickered when “off”, so I changed to some halogen bulbs, and they turned on, got brighter and brighter and then just turned off.
I’m on a two wire system, so that may be the issue, but I’ve given up on the idea of installing them all in the switch boxes, and will revert to the new Philips Hue bulbs.
The only issue with Philips, is the expense. Some of my lights in my house have three bulbs, so that’s £150 in light bulbs! Times that by 5 light fixtures and you’ve got a big invoice.