Window lead design warping

[Clocks]

Hi all, I have a Georgian design on the window panels on my front door but on one of them the lead design is curving upwards and I have no idea why and how to fix this. Any help gratefully received. Here’s a photo...

 

[big-all]

as its stuck on lead its bored kids/adults pushing it up or compression off something on that surface encouraging the lead to slide
if it was expansion the lead has no strength so would bend or deflect down through weight rather than push upwards??

 

[ronniecabers]

Normally you would see the lead ' buckle ' if it was an expansion/contraction issue . The lead should be under the door moulding and I'd be very surprised if a person would be able to push it like that , my guess would be a window cleaning tool has caused it. Or the lead wasn't properly ' rolled ' after it was adhered to the glass. Three solutions, one , if under warranty, call them out, two, remove the unit and straighten the lead yourself. Three, straighten the lead in situ , cut any excess off that doesn't go behind the beading with a single edge razor blade ( or similar) , then press incredibly firmly along the line of the lead

 

[Clocks]

Thank you both for your advice. I will take the steps you suggest.