Mhhh it seems to be related with the way I'm applying tags... at the moment I'm using the following stanza in my tags.conf
[eventtype=proxy_logs_*] proxy = enabled web = enabled
and it seems to apply tags only if you use them at the beginning of the search string.
I know the wildcard usage in this specific case is not documented but it seemed to work 😛
Using one stanza for each eventtype value seems to solve the issue (i.e. manually expanding the wildcard).
Yes there is nothing that prevents you from doing that. I just tried this out in my SFDC environment I get events returned back.
index=* tag=sfdc | search tag=opportunity
May I suggest that you try this search to verify that other tags exists for your events that are tagged with web?
index=* tag=web | stats count by tag
Let me know how you get along.