Shortly after joining my server I end up crashing and minecraft closing itself.
crash-2020-02-12_12.27.12-client.txt

Some kind of keybind handler from AdvancedRocketry appears to be the problem:

java.lang.IndexOutOfBoundsException
	at java.nio.Buffer.checkIndex(Unknown Source)
	at java.nio.DirectByteBuffer.get(Unknown Source)
	at org.lwjgl.input.Keyboard.isKeyDown(Keyboard.java:407)
	at zmaster587.advancedRocketry.client.KeyBindings.onKeyInput(KeyBindings.java:59)
	at [...]

I can't say I've ever seen anyone else post this particular error before. I suspect you're pressing a key that is bound to multiple mods, and one of them is getting the keypress before AdvancedRocketry and handling it in a way that causes an index out-of-bounds exception to occur when AR's event handler gets invoked.

It happens shortly after doing anything whether I open my inventory or stand still... one of the weirdest crashes I have definitely had.

Can post some of the other crash reports that I have after trying to connect repeatedly and doing different things each time if that would help.

Feel free to. I agree that's a strange error. Have you tried unbinding all of the keys for AdvancedRocketry in your Controls settings before connecting?

Yeah that worked thanks... I think the problem looking through controls was I that I had set the AdvancedRocketry Toggle Jetpack to what I wanted the simply jetpacks control to be, and without said jetpack it would crash upon joining.