E-gate failed when entering, departure e-gate ok. Believe you need to use manual once in bangkok.
The manual counter slow because the other traveller so stupid, dont want join the queue at other lane. I need to ask those infront of me to go and the queue was fast...less than 20mins. I recommend go manual q at the most left as possible, far in.
I frequent krabi and their system not link to bangkok. Krabi no issue, the krabi immigration didnt bother to check the arrival card or take my prints and i frequent go there.