Twice, funerals have necessitated my return to my home country (UK) during this month after applying for a year visa marriage extension, and there has been no problem whatsoever.
On one occasion, the lady at immigration (Jomtien) even assisted by extending the period to six weeks, instead of four.
Perhaps others who have recently used this path at Jomtien might be able to provide information concerning the funds on passport collection (though on his first visa extension, he merely had the passport stamped and away).