Karnataka State Road Transport Corporation [Ksrtc] — Unable to book ticket from Puttur to Madikeri

I want to book a ticket online with the following details:
Journey: Puttur to Madikeri
Date: September 30, 2022
Return Date: October 1, 2022
Trip code: 0600MNGBNG
Time: 7:15 AM
Bus: Karnataka Sarige

But it shows all seats are booked.
When I change the filter to Mangalore - Madikeri, I can see 38 available seats for the same bus.
Why can't I book seats from Puttur to Madikeri?

Please fix this issue as soon as possible.