Wrong block and item textures

So I was building some cool looking redstone contraption, when suddenly someone texted me and I accidentally clicked on the notification. I went back to Minecraft, but the textures for all blocks were mixed up. I wasn't playing with any resource packs or mods, just Vanilla 1.18 Minecraft.

 

Here a video: https://drive.google.com/file/d/1e24nJYVdW6U_fjwEogB_qGZ4AzDNjFqj/view?usp=drivesdk