Issue description:
Screens causing a fatal connection error due to an out of bounds exception.
Also screens crashing to desktop (not generating a crash report) when right clicked when not reconnected to the screen controller.
The first issue went away after the screens were removed.

Steps to reproduce:
I Honestly don't know for the first issue, was working perfectly fine until today when going within render distance of them caused me to lose connection and every time I Tried to reconnect I Got the same issue.
For the second, place a screen and right click it without it being connected to a controller.

Versions:

• Minecraft: 1.12.2
• Forge: 14.23.5.2772
• CompatLayer (only if on Minecraft 1.10 or 1.11):
• McJtyLib: 1.12-3.0.5
• RFTools: 1.12-7.59

Possibly incompatible mods and versions:
Optifine 1.12.2_HD_U_C7
foamfix-0.9.9.1-1.12.2
BetterFPS-1.4.8

Relevant logs, if any:
https://pastebin.com/WEDchQ5B

Can you try it with just RFTools and its dependencies installed, and with McJtyLib updated to 3.0.7? Also, is this single player or server?

I Will boot up my test client and server tomorrow to test it under the same circumstances with just those, was just heading off for tonight.
And it was on a server

It's worth seeing if it will happen in single player then too.

Any update on this?

ahh! Sorry, things got really busy for me and I Haven't had the chance to test this out, will do so hopefully later today or tomorrow, apologies for taking so long.

I Tested it in Single Player and I Couldn't replicate either issues, as for the main issue of the fatal error, we couldn't reproduce it, we don't know what caused it the first time it happened, as after breaking the screens and putting them back down it stopped, and it was only on one client out of the six connected at the time.