Homekit integration stopped to work


I have been using my hue lights through homekit for long, but suddenly, it stopped working. All the bulbs are displayed as not responsive in the homekit dashboard, although those work well through the hue app

I removed my home from homekit, and tried to create a new one from hue, but when i am asked to push the link button in the bridge, nothing happens. On the same hand, if i try to add a device in homekit scanning the label, it says the item already exists and needs to be reset first

Has anybody had this issue before?