During a tick freeze, the server still runs functions tagged #minecraft:tick very often (I donʼt know if itʼs still 20Hz like normal); this makes debugging of tick-perfect data packs much more difficult. To reproduce: Create a datapack with a function tagged #minecraft:tick with ...
You can also create a command block to repeat and enter a command to find a non-existent biome (/locate biome crimson_forest in the overworld) and activate, then the world will freeze hard (no fps drop is observed). Minecraft Preview 2022-06-24 17-53-43.mp4 [Mojang] Mega_Spud (Jay...