Playing with a friend in minecraft 1.12.2 on the latest version of Draconic Evolution we met with a problem on the server.
When you hit and the appearance of the shield in the armor just hangs game! So fix it!!! For example you hit the zombies and all... you're stuck. And if you fall into the lava so do not do anything just endlessly will be loaded game and eventually fly.

That is not exactly a complex renderer... What are your system specs if you dont mind me asking?

10 GB of memory
378 processor (I don't know what it is hosting is written)
5400Mb of RAM

by the way we began to play on 1.10.2 and there is no lag

The next release will have a config option to disable the hit effect.