Server, wierd certain chunks not loading

I have an annoying thing in my server where chunks are not loading in a noticeable pattern. Here are screenshots:
https://prnt.sc/lrmdwb
https://prnt.sc/lrmfnt
https://prnt.sc/lrmbua
https://prnt.sc/lzrj96

plugins and version: https://prnt.sc/lzrkug
PaperMC 1.12.2

Code:

[17:27:47 INFO]: [PlugMan] Plugins (61): AlqWhatToBuild, Arceon, ArmorStandTools, BetterBrushes, BuildersUtilities, Citizens, CitizensCMD, CommandSpy, CustomBM, DeluxeChat, DeluxeTags, DiscordSRV, Ersatz, Essentials, EssentialsAntiBuild, EssentialsSpawn, FastAsyncVoxelSniper, FastAsyncWorldEdit, FeatherBoard, goBrush, goPaint, HeadDatabase, HolographicDisplays, HolographicExtension, Hydra, ItemJoin, LibsDisguises, LuckPerms, MessageAnnouncer, Multiverse-Core, MVdWPlaceholderAPI, MyCommand, NightVision, OrganicModelBuilder, PacketListenerApi, PixelPrinter, PlaceholderAPI, PlayTime, PlotSquared, PluginConstructorAPI, PlugMan, ProtocolLib, ServerListPlus, SilverfishBlocks, SimpleRename, SimpleSit, Skellett, Skematic, SkinsRestorer, SkQuery, Skript, skript-mirror, SkriptJSON, TAB, TagSomeone, Vault, VoxelSniper, WorldEdit, WorldGuard, xInventories, BrushInfo
> ver
[17:27:49 INFO]: This server is running Paper version git-Paper-1593 (MC: 1.12.2) (Implementing API version 1.12.2-R0.1-SNAPSHOT)
[17:27:49 INFO]: You are 1 version(s) behind

(It was still occurring on spigot)
As far as I know, people have told me that this is a mojang issue that dates back to years from now, but I am still hopeful that there is a fix, else I would have to redo the whole server because this is a creative server and not loading chunks is a big liability.

 

I've had this issue before, I believe it was caused by either world edit or world guard. Do you have either of them on that plot server?