I'm thinking of multiple use cases and the question you have.
• If I'm not too far behind the last release and I just want to resolve the issue, I want to look at changelogs to know if it's worth updating. Then I look for possible workarounds or discussion on the topic if it doesn't seem that the latest release resolves the issue.
• If I happen to have a generic issue that pops up and I want to find a resolution for it, again it depends how far from the latest release I'm. If I'm near, I would always first look at the changelog, and only after google search (because a search engine would add a ton of noise anyway...)
• If I'm far from the latest release AND I don't want to update, then I'm looking for a workaround.. so google search or search through issues to find the possible discussion around it is the way to go