Hey,
When typing /lp log recent, it only displays 65 actions from 4 months ago. Is there anything that would prevent the logs from being saved?

What version of LP?
Which storage type are you using?

Any errors when you run the command?
What data is missing, more recent items, or entries older than 4 months ago?

I'm using LuckPerms v4.2.51, both on bungee and the other servers. The storage type is MySQL.
No errors are displayed. The most recent data is missing. There are changes to the permissions almost every day.

Is logging enabled in the config? Do you see the log messages in chat and in the console?

Could you try reverting to the most recent build on Spigot to see if that resolves the issue?

Yes, I have log-notify set to true in the config and I can see the log messages in chat and in the console.
Tried with LuckPerms-Bukkit-4.2.17, same thing. :/

Edit: Also, I noticed that all players with timed groups are getting duplicates of these groups. So if a player had x days of group "vip", he now has x days of "vip" but he is also with a permanent "vip". This started happening when I switched from LuckPerms v4.2.42 to LuckPerms v4.2.51. If I try removing the permanent one, it comes back after some time.

??