Thanks Matt,
We don’t have any other search related plugins installed. We don’t use relevansi on this site.
We are hosted on WPEngine and we use their caching, but I have purged all caches thinking that might be the issue but it didn’t help.
I disabled your plugin yesterday and confirmed SKU searches don’t work at all without it ??
Then today I re-enabled your plugin and all the failed ones we had tested were found.
So it may very well have been caching related. But let me ask, is there anything special your plugin does when activated that might have fixed it?
Thanks!
Sim