Air Asia flight no longer available

I am going to Thailand in June and will be traveling from Chiang Mai to Krabi. Air Asia is the only airline operating CNX-KBV nonstop when I’m going and up until yesterday they had 2 flights each day- 6:30am and 4:30pm.

Today when I went to look, the 6:30am flight was no longer available, not on the day I was looking to travel or any day surrounding it. If I have to do the 4:30pm it’s not a huge deal but we have a 3 hour drive from KBV to our hotel so I’d much rather take the early flight than the late one.

Is it likely that Air asia decreased the frequency to 1x per day? Could this be a glitch? Is the flight likely to return?