BPN-TSA political restriction... after i made a flight.. (not before)

(wish i'm in the right forum)

I experience something odd just then.
I make a flight from BPN (Balikpapan, Indonesia) to TSA (Taipei Sungshan, Taiwan).
It was fine at first, until I try to lower my price, then this problem occur.

it says:

You have no flights on this route.

You cannot fly this route due to political restrictions.

First, ive already made a flight on this route.
my fellow competitor, Sibul Airways, was also there.
and look, there is my airline Ekor Cincin Legacy listed on the diagram.

so what happen?
was this just a little bug?
or just a random bug which accidentally happened to me?

thank you in advance.