Hi
An interesting problem
Go to the admin panel my forum
Manage Members
Awaiting Activation [XX]
Check all and click button "Check for duplicates "
the page is refreshed
All Date Registered
01 January 1970, 02:00:00
(Link-4674) Click "Don't check for duplicates"
All Date Registered normal
(Link-4676)
Fix pushed: https://github.com/elkarte/Elkarte/pull/2928/commits/e47b97fd44b83e59d16909b251d3cb7f319b5717