It appears as though the captcha bug is specific to certain carriers. It seems to occur on Sprint in the US. Now that I know that, I can more accurately find and fix the problem. It would be helpful if people who are experiencing this problem would download the test version and just use the app like normal. Installing this build won’t replace your current version of Mimi. It will install as “Mimi (Test).”
Of course, if you just want to get rid of ads you could install this too. It is a test build so it’s probably less stable than normal. You won’t see any ads before it crashes, though.