I notice lag about once every few hours or so, nothing strangely different in Kelp than anywhere else. And it’s not lag, just a stutter for 1-2 seconds. Pop-in does occur but in an underwater game at depth, it’s not a huge problem as I’m playing it. Above the waterline it is more noticeable, with being able to see part of the Aurora at distance, but not all of it, etc.
Friday evening I left my laptop going overnight but paused and continued most of Saturday without restarting and didn’t notice anything different or crazy. So if there is an issue, I’d expect it to be cache related, not memory related. And if it’s cache, @DeepT I’d expect someone has found a way to clear that. I did see one post elsewhere about the Aurora causing lag and there was indeed a cache file mentioned to remove if that happened.
Other than that the only bug I’ve encountered was not being able to use things out of inventory which happened once. Leaving my base and going back in cleared it. I also had a not-quite-bug, which is that a fish got stuck under my base and was causing ongoing damage until I found which part, disassembled it and let the thing swim away. Apparently the player can cause that (chasing fish), but normal fish behavior does not, usually.