Not to contradict tod Daniels, the one person I know who has the same ox visa, also has to do his report once a year (and he has had it for some time already so has done more than one report)
3 years ago, I was in a similar situation. I had 5.5 months left on my passport. I needed to do a boarder bounce before applying for a new passport in bangkok. I flew to Hong Kong (they only red 1 month left) for the day.
Before I left bangkok, I double checked with the check in counter and they checked with immigration. I had no issues coming back to thailand.
work permit valid until 8 of January next year. I'm just confused about my lawyers warning. But I think that it's lost in translation. Shim can get an education visa and Stef dependant but 500 000 in bank for five months for that one