Can you provide me with the model\product number and serial number if you have it.
This should allow me to pull up the spec for your hob, this sounds most likely a hardware fault, however in many cases replacing components is not very costly.
Normally I would have expected the display to show an error code.
With the unit switched off, I would use some glass cleaner and give the entire hob a good clean and ensure its grease free.
Turn the hob back on and then see if the red light comes back on.
If it does this would suggest a general hardware fault, reading into this abit further it could be a sensor fault, since for both lock and pause lights to illuminate it suggests there is a problem with the control panel interface.
Let me know the outcome of cleaning it, and if the fault is still occurring I will get quotes for a repair.
Ive never serviced an Atag hob but the majority of induction hobs user generic parts anyway.
Reading the manual for your hob it confirms the reason for the light above the <pause> button blinking, is due to water or dirt on the hob surface.
Since the surface is clean, I am confident it must be a HID fault, which picks up the touch of your finger. It could simply be the underside of the glass being dirty if something boiler over, however in my experience its the sensor which reads you finger\gesture which is at fault.
This would set you back around £100, however I cant find anywhere which is selling ATAG parts, so would imagine you will struggle to find an engineer or service centre in the UK. My suggestion would be to call up ATAG see if they will do a fix price repair, if they dont I would look to replace it, as its most likely going to cause you more issues as it gets older if the parts are already obsolete.