Fletching table flashes crafting table's GUI for about a second upon right-clicking it in spectator mode

The Bug:

Right-clicking the fletching table in spectator mode flashes the crafting table’s GUI for a split second. This is probably happening because the fletching table is using GUI group ”0xFF” which isn’t a valid one.

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Steps to Reproduce:

1. Get a "Fletching Table" and place it down.

2. Go into spectator mode by using "F3 + N", "F3 + F4" or by just typing in chat "/gamemode spectator".

3. While in spectator mode go near the fletching table that you’ve just placed and then right-click the previously mentioned block.

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