SQ Redemption not working IST-BNE

[dxwell]

Been trying to book a SQ redemption for IST-BNE J class for early January 2021.
I hit the button at exactly 10am AEST 355 days out, but only see Advantage redemptions.
I can see IST-SIN J Saver redemptions for the date, and then the next day I can see SIN-BNE J Save redemptions.
Is this because of the time of year? I booked the reverse direction in mid-December without issue and have booked IST-BNE J Saver before without issue.
Thanks in advance if you have any insight into what is happening here.

 

[oliver_adl]

There are Saver options on 11th, 13th and 15th at least (probably more).

I think the availability fluctuates and more and less is released at unknown intervals. I had a similar redemption requirement (though booked more like 8 months in advance) awhile back and saw dates that had no availability or advantage only start to add saver options, and same in reverse over a period of a few weeks.

Certainly right now on the 11th all 4 route options with layovers between 1:30 and 19:10 are available for 86k KF miles.