Steps to reproduce the issue

1. Turn on the registration on the site and the Self value for parameter New User Account Activation.
2. Register on the site with a real email address. Follow all instructions to activate your account.
3. Go to the User Actions Log section and pay attention to the lines.

Expected result

1 entry in the action log - AFTER account activation

OR

1 entry in the action log - BEFORE account activation and 1 entry that the user has ACTIVATED his account.

Actual result

2 identical entries in the action log - BEFORE and AFTER account activation.

System information (as much as possible)

Joomla 3.9.18
PHP 7.3.2

Additional comments

I assume that for the expected option (1) it is more difficult to implement the logic, since there are other actions that the user performs before activating the account (e.g. privacy policy and terms). Therefore, in my humble opinion, option (2) would be the best solution expected.

The same situation is with us for the case when the administrator activates the user account, but BEFORE this, the user is registered (1), and then activates (2) his account - again 2 identical lines in the action log.