This year, in Ratchaburi, I had a problem with my 800K. For several years now it has been in a fixed account. The only thing I do is deposit 1K on the day I'm going to do my extension so Immigration can see an entry for that day.
However this year, for the first time, the IO had a problem with it and did not want to give me my extension. She saw an entry where the bank rolls the money over after a year for another year with a new interest rate. She told me I had gone below the 400K that day and so could not qualify for my extension. It did show an entries that look like a withdrawal and then an immediate redeposit. I kept trying to tell her I had not taken any money out of the account for several years. She kept going on about it for several minutes. But then finally decided to call the bank, SCB. It took them awhile to get her to understand what the entries were. But she finally relented and gave me my extension.
I think this year I'm going to exit the country and reenter to both facilitate putting the money into a normal savings account and killing off my O-A requirements for insurance.