The real value is the active one which is used. The master value is just the default value which can be overridden by local settings like user.ini, which can also override by PHP code
set_time_limit(). And unfortunately, I'm not sure which one is honored.
The phpinfo.php picks up the setting correctly, but Wordpress and other scripts could have their own set values too which locally changed. The phpinfo.php is just a single file compared to Wordpress.
I'll continue checking, I deactivated both theme and plugin and when I checked the admin in the console, it still displays
Slow network detected in my console. Is it okay if we disable your SSL/HTTPS while we're investigating? It just has URL redirect and MIX content fixer which may be altering the data payload.