Increasing signature values on rides without fitness breakthrough

My understanding was that to make Xert increase the signature values, you need to have breakthrough efforts in your ride. However on my last ride Xert increased my peak power by 70, and my TP by 4 (to 271) watt. But the ride doesn’t have any breaktrhrough efforts at all. Is my understanding wrong? Or is this a bug in Xert?

Check your Account Settings / Profile and Signature Decay Method. If it is set to “No Decay”, you signature will increase and decrease with the individual training loads. See our blog on “Magic Setting” for more information.

But it’s not. It is set to ‘Original’. I have not touched any of those settings.

Send support a note with screenshots if possible and we can have a look. Cheers.