I am using EnderStorage v2.4.2.126 in the FC3 modpack.

If I hold a bow in my off-hand and right click, the pouch opens but the bow also draws back. When the pouch closes it fires.

I believe this is specific to the mod item as I also use a Thermal Expansion Satchel. This operates similarly, right click to open an inventory but it does not cause the bow to draw back.

This was fixed, please update your mods before posting issues.