Version Info

• Minecraft, 1.12.2
• Tesseract, 1.0.21

Description of the Bug
I have a extreme reactor and want connect 32 turbines. For fluid Transfer i use tesseracts. So i need 2 channel for each turbine.
After 12 channel i can add channels but can´t see them and have no scrollbar apearing

Steps to Reproduce
add 12 channel in one section (item, energy or fluid)
add the 13 channel and you cant´t see him

Screenshots
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I haven't added a visual scrollbar yet, but you can still just scroll up and down through the list.

How can i do this. The middle mouse button have no function there and the cursor-keys on my keyboard not, too.
Or is there any keybinding i can change in the options to scroll through the list?

It might be that I have messed it up for 1.12 then. What I meant was just using the scrollwheel.
I don't have access to a computer now, so I will have to check after the weekend.

The scrollwheel have no function in the list for me. Your lib can not be the error? because i use the latest for 1.12.2 not the version which was from the mod asked for. If it can be a possible problem by the lib i can check this and tell you before the weekend is over.

Have found the reason for the bug?

Turns out the mouse coordinates were being translated twice, thus the scroll area ended up over to the right and bottom of where it should be.
I fixed it now in the Core lib version 1.0.9a for Minecraft 1.12.

Thank you for reporting the issue!