When inventory is set to 'Tab', you are unable to press tab again to close.

As the summary says, when inventory is bound to 'Tab' you are able to open the inventory perfectly fine, however, if you try to close the inventory with tab, it will highlight the recipe book instead of closing the inventory. As far as I can tell, there is nothing you can press on the keyboard to activate the recipe book so if it is possible to just disable the 'Tab Select' for the recipe book, this small issue can be resolved. However, this may also bring another bug into light; you aren't able to actually active the recipe book via keyboard.