Describe the bug

Weird thing with Sophisticated Backpacks.

In normal inventory, if I shift click an item from my inventory into my hotbar, it goes into the leftmost open slot on the hotbar.

However, (and annoyingly so), when shift clicking a tool from the backpack into my hotbar it goes into the rightmost empty slot in the hotbar.

Crash log if it's a crash.
Info on what other mods you're using that may cause a conflict here if applicable.

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To Reproduce
Steps to reproduce the behavior:

1. empty the middle four slots of your hotbar, and put the cursor on slot 4 in anticpation of using the tool
2. test shift-clicking some tools from your inventory into the hotbar and you see they wind up in slot 4 if it's empty, ready to use
3. now press B to open your backpack
4. now test shift-clicking some tools into your inventory and you will see they wind up in slot 7 not slot 4 and now you have to either undo and use a number key to move the tool to the chosen slot, or mousewheel over to it to use it

Expected behavior
exactly as it works when doing it from personal inventory

Screenshots

Versions
sophisticatedbackpacks-1.18.2-3.17.2.588.jar

Additional Information
This Issue has been submitted on the FTB Issue tracker for FTB Direwolf20 1.18
FTBTeam/FTB-Modpack-Issues#899

this is the exact same behavior as when shift clicking from any vanilla container (chest/barrel) so you would need to complain to Mojang if you want to have this changed, from my point of view I would much rather have backpacks consistent with any other container than have it consistent with just player's inventory handling.