Images Puzzle verification hided

Hello,

After several repeatedly login, images Puzzle verification started.

1) The Images Puzzle verification always hided by login form. See the link:
https://ibb.co/s3sty9D
How to bring it to the front of popup login form automatically when it started? and auto disappear after completing the image puzzle verification?

2) How to not to enable the images Puzzle verification in case I want?

Please advise. Thanks in advance!