Local file cache hit rate dropped to 0

Hello, We've been using Neon for a little over a year and have always seen our local file cache hit rate at more than 99%. This past week we observed it drop to 0 and rebuild back to 80% before dropping back to 0 and sustaining. the first time this dropped to 0 was during a deployment when connection count spiked however the second time we saw it drop to 0 was when the connection count dropped to 0