Did you open or close a Lightning channel for 1 sat/vbyte? Most people do unless opening the channel is a priority. Well, the current state of the Bitcoin mempool is putting a hindrance on these transactions. They're getting pruned or removed from the mempool.

I was worried that a recent Lighning channel close that was set at 1 sat/vbyte would get pruned. And it did. Thankfully, with a little command line help, you can bump the fee on that transaction and get those funds swept into your on-chain wallet in a timely manner.