Conflict with “Really Simple Security Pro” plugin

I noticed that when Seraphinite Accelerator (with the original configuration) and the “Really Simple Security Pro” plugin (pro version) are active, login (wp-login.php or /wp-admin ) doesn’t work.

After entering your credentials, the page reloads and doesn’t log in, and no errors are displayed.

I discovered that this happens when both plugins are active, and Really Simple Security Pro has the “Limit Login Attempts” feature enabled.

This feature blocks access after a certain number of incorrect attempts. Disabling this option works.

The two plugins conflict for some reason, but I don’t understand why, since it happens on the wp-login-php page, where your plugin shouldn’t interfere.

Is there a specific setting to prevent this?