Observation 5096905: TYVAK-0130 (48606)

Regarding Observation 5096905 … Very strange. Why no decodes, or even audio, on this pass? Please explain.
Thanks & regards.

Observation mention FM, there is no decoding process… (I believe)
ve2dsk

TYVAK-0130 48606 400.781 FM FSK 9K6

https://db.satnogs.org/satellite/KSSW-6265-7790-8248-7471#data