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Minecraft Version

1.14.4

Forge Version

28.2.1

Mod Version

1.0.2-11

Describe your problem, including steps to reproduce it

Whenever I try to put a programming puzzle piece in the programmer, it disappears, but remains there. I cannot see it, but when I hover over it, it shows the information.

Any other comments?

That version is really out of date. Upgrade to the latest 1.14 release.