Why is my funds trapped in my Bangkok Bank account for 6 months after transferring money?

So, I'm not sure if this is general knowledge, as I've been told before.

I opened a Bangkok Bank account ten days ago. I then used Wise to transfer ten thousand pounds (400k baht). I also transferred some extra, realizing how quickly Wise worked and that you can be like a Thai and use the QR code with it to pay private accounts. The bank just rang me this afternoon to tell me that the 400k cannot be touched.

It shows I have the money in the bank, but my available balance is only twenty-six thousand. She says it is trapped for 6 months. Luckily, I had put it in there, and I was going to forget about it.

So, each year I have the four hundred k required, but I'm letting people know in case your situation is different.