We did have a glitch for about a day where search terms were marked as other or unknown, so you may still be seeing some unknown search terms in your stats from that stretch of time. However, new search terms going forward should appear as normal.
However, even though we fixed this glitch, it's likely you'll keep seeing some other or unknown search terms in your stats. Some search engines don’t reveal search terms for privacy reasons. That’s why we don’t always know which search terms were used by visitors who arrived at your site from a search engine. When we don’t know the search terms, we show them as “Unknown search terms."