Troubleshooting Apollo CSV Enrichment: Why It Hangs and Solutions

I am trying to enrich a csv table using Apollo to get more information like company URL and work email. Apollo just hangs without providing a result, over 15 minutes now. I tried using an Apollo enrichment on a field I have run previously and it runs in seconds retrieving the same info as previously. I am only running a few individual rows manually right now, so it can’t be due to a large number of rows. Is there any known issues with Apollo hanging at times but not at others? Any solutions or workarounds?