The requirement for a TM30 reentering Thailand after overseas trip is tied up to online reporting. Immigration wanting to sync TM30 with TM47.
Suggest you do a 90 report via mail 75 days after return date.
Personally had several trips out of Thailand..In fact Saigon tomorrow.
If my next annual extension requires a TM30 (never previously 12 yrs at CW) then I will file one.
Aside: if the in person was absolute after every overseas trip, then I would do no TM47 and pay 2000b at annual extension.