Hello,
I was told to open a issue ticket by Scarsz. I'm not 100% sure if this could be a bug or not. But it seems like the nitro booster context (Permissions & Group) from luckperm/disccordsrv doesn't work. I've tried asking help in LuckPerm support and still have no luck in resolving this issue.

First thing is I've tried adding nitro booster context to luckperm according to discordsrv wiki. When players nitro boosted they still haven't gotten the following permissions I added a context too. Then I was told by LuckPerm supporters to updated to latest version of LuckPerm and DiscordSRV (Builds) which I did. Afterward I was told to remove permissions context and add a nitro group context instead which I did. I was told to add it too the "default" group from LuckPerm which then the nitro boosters did redeem the permissions. However I have a rank call guest that players first rank added to default as well "group.guest" and nitro added to default as "group.nitro" it seems like it allows nitro boosters to get the rewards but somehow it interfered or bugged out allowing guest players to get nitro booster rewards as well since both are in the default group of luckperm. I'm running out of ideas on what is wrong with it. My final guess that it could be bug with permission and group context either from LuckPerm or DiscordSRV.

I do not see any console errors either.

LuckPerm Version: LuckPerms Bungee/LuckPerms-Bukkit-5.2.106
Discord Version: DiscordSRV-Build-1.22.0-SNAPSHOT-1613004457

One of the player context via LuckPerm: https://gyazo.com/7a74cfc4e8a5c217e31cdeb6147f8b19 (It shows that they are verified on discord.)

Hello,
I've got this resolved.