Altium has not calculate delay for specific inner layers

Hello,

I am using version 20.0.10 and have an issue with delay calculations. For spesific layers in my design delay calculation does not work and stuck at zero ps, not incrementing. I have attached the screenshots. First ss shows the lane, delay shown as 0 for that layer but it works fine for top layer. The other ss shows delays in ps for whole line. Top layer has delays (can check it segment by segment) but this spesific inner layer adds zero delay. (By the way i have other inner layers and they are just work fine.)


I thought this is all about stack up and changed it lots of times but nothing changed. I attached the stack up also.

Can someone please help me about this? I am clueless right now. Is it because some option or ruıle or something? At the moment i have no idea and need enlightment.

Thanks