There are at least 4 videos recorded by 1 player showing instances where you should be taken damage from things passing through you, but you just don’t.
To start, a Plantera fight (in 3 videos):
The one thing that each of these video clips have in common is that there are several instances where you should’ve taken damage from being attacked. But they just pass through you like they’re not even there. You’re both moving smoothly without snapping around or teleporting back in places and dealing damage to enemies, which shows that you weren’t lagging. As well, about 23 minutes after the original report, there was this Daytime Empress video put up of you:
Once again, there were no signs of lag as you were moving around and attacking both the Empress and a couple Harpies. After passing through the tail end of one of the attacks, you sit still, type out a message, and send it. During that time, both Harpy Feathers and the Empress’ attacks went straight through you without any damage, and once you were done you immediately started moving and attacking again, dealing damage to the Empress and killing the Harpies respectively. It all adds up to show that you were not lagging, that your connection was stable enough for the server, which means you should’ve died or at least been hit there. But neither of those happened. If you were truly lagging like you claimed, can you explain how any of this happened?