Cannot use <a> tag for Double Opt-in now, last week woking find. How to solve it?

Hi everybody,
Last week my campaign working fine, I have a button (HTML button with < a > tag) and when click on that, open url to confirm. But now, It not woking
Last html code:
<a style="background: url(&quot;;) left 15px center / 20px no-repeat, linear-gradient(rgb(63, 195, 128), rgb(4, 147, 114)); padding: 20px 15px 20px 40px; border-radius: 5px; color: rgb(255, 255, 255); font-weight: 600; font-size: 18px; margin-bottom: 20px; text-decoration: none;" href="">CLICK ĐỂ NHẬN MÃ KÍCH HOẠT</a>
Now when click on the button in Email ~EmailSent.Id~/~EmailSent.PartialHash~ not convert to right string, so 404 Error
(Like this:
I try:

  1. Remove format, only pure < a > tag with href but still error
  2. Put at Email content then it woking

Thanks for your help

Hello, Is that new update of Infusionsoft? Now, we cannot use HTML Button Confirm OptIn…Is that right?

I have run into the same issue. But it looks like now the button block allows you to use the OptIn and OptOut merge code.

I now have confirmation buttons without hacks!

Hopefully it stays supported.