'unspecified' cause for tps lag

caused by datapacks but i cant even know which one causes it. checked possible reasons on https://misode.github.io/report/, and resorted to timings, doesnt show up despite saying 93% of tick (total doesnt add up). spark says there's 450 markers and 300 item frames present in the server. it's def that but i can't find which cause. tping to the chunk a bunch of those markers are located in only shows me a plains biome. nothing unique

heres the reports.
maybe i'm reading it wrong
https://spark.lucko.me/vIM3cOENXb
https://timings.aikar.co/dev/?id=0b56bb102eb04408be490bc3d31b0496
spark is a performance profiler for Minecraft clients, servers, and proxies.
Aikar's Timings Viewer - View Timings v2 reports from Paper and Sponge
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