Critical Error logging suppression?

Today we received a critical error on a site. When checking the server logs there’s oddly zero corresponding logging, when typically there’s *always* an associated log entry.

Deactivating the object cache (but keeping the plugin active) appears to resolve the issue.

Are there circumstances under which critical error logging could be suppressed if the error occurs in Docket?

Or is it more likely that the critical error was elsewhere in the code, cached, and then because it was being served from cache, no new logging occurred?

TIA for any insight!