Latest version is breaking passwords

The last few times I have deployed the site I have been getting WordPress Database inaccessible error after I have done the installer and it prompts me to login to complete the process.

My password for example is testing1£££££2111

When I look in the wp-config.php I am seeing this:

/** MySQL database password */
define( 'DB_PASSWORD', "testing1\u00a3\u00a3\u00a3\u00a3\u00a32111" );

Changing it back to this fixes it:

define( 'DB_PASSWORD', "testing1£££££2111" );