The error I get:
Internal Exception: io.netty.handler.codec.DecoderException: java.io.IOException: Payload may not be larger than 32767 bytes
log.log

I am playing on stacia expert.
Connected a 6x6x6 colossal obsidian chest to a crafting station. When opening the crafting station it loads the colossal chest inventory on the left as it's supposed to do.
I search for a recipe on JEI, click the [+] and it crashes.

Worth noting that with a 7x7x7 the crafting station does not load the chest inventory, instead it crashes with a different error.

Tried looking into lowering maxSlotsPerPacket value as described here to 1000 or increasing it to 100000. Same result with different numbers.

Tried in single player and it works fine.

It seems this could be like this issue here.

Thanks

Thanks for the report!
The log you posted doesn't include a DecoderException at all, maybe you uploaded the wrong one?
I can take a look at how to support this (if possible) once I have the full stack trace.

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