Wifi works only on safe mode on pixel 3XL

I'm an happy owner of the Google Pixel 3XL. It's been working like a charm for ages, but since a few weeks, the WiFi & Bluetooth started to fail after a few hours for system uptime. I first thought about an hardware issue , but both the WiFi & Bluetooth works in Safe mode. Is there anything I can do to fix this without making a full reset of the device?