Custom Inventory slots can break if configured a certain way

Slayer

Before we get to the bug report itself, I just want to add a little bit about this before hand.

I'm not enirely sure if this is a bug, or just the way this process is designed to work.
However, due to it's success/failure being inconsistent in nature, it leads me to believe it may actually be a bug, and even if not, may need to be looked into, in order to provide consistency in behavior.

It's also a fairly detailed report in efforts to give you as much information to look into this as possible.

BUG REPORT

Does the issue occur in the editor or during gameplay?

gameplay

If it's a gameplay issue, please specify which movement system and camera type you're using (free movement vs. grid movement, third-person vs. first-person) or N/A if not applicable:

N/A

Briefly describe the issue you're experiencing:

There is an issue/bug that can appear if you build a custom inventory a certain way that can result in certain slots (seems to be random slots) not being able to use the item in that slot. If you right click the item, it will either use the item in a different slot, or if the only item in the inventory, just won’t use it at all.

This scenario can be consistently recreated in a couple of ways so let me outline them below:

IMPORTANT: Start with a brand new widget for each scenario for reasons explained after

SCENARIO 1 (the most consistent)

Make a custom inventory widget, assigned as the default inventory, and add some item slots to form a couple of rows. (let’s say 10).
Before playing the game, swap their positions, so that instead of going in sequence:
[0001] [0002] [0003] [0004] [0005]
[0006] [0007] [0008] [0009] [0010]

they go in a more mixed order, for example:

[0009] [0002] [0004] [0010] [0006]
[0001] [0008] [0003] [0007] [0005]

Now play the game, and give yourself 10 of the same usable item so that each slot has one.
Try and use each slot’s item and notice how some don’t use their own item, but another slot’s, until only those ones are left and they then can’t be used at all. (moving the item to a working slot can use it though).

SCENARIO 2 (this one’s more interesting)

Make a brand new custom inventory widget, assigned as the default inventory, and add some item slots to form a couple of rows. (let’s say 10).
Play the game and give yourself 10 of the same usable item so each slot has one.
Use each item... works fine.

Now, edit the widget and simply move the slots around... not even out of sequence but just move them.
For example go from:
[0001] [0002] [0003] [0004] [0005]

to

[0001]
[0002]
[0003]
[0004]
[0005]

Play again, and now, because you moved the slots since you last played, the same issue as scenario 1 happens again.

Why is it important to start a new widget each time?
Once this issue happens, those slots can often (not consistently though) remain broken until you actually remove them and add new slots.

Are there any errors in the in-game debug console or external console window?

No

Provide the steps necessary to reproduce the issue:

To Test Scenario 1

Make a widget with 10 item slots

assign as it as a Default Inventory Widget

Rearrange the slots so they are still in rows but out of ID sequence order

make a usable item (non-stackable)

play the game and give 10 items

Try to use them all

To Test Secnario 2

delete the widget/slots from test 1 first

make a widget with 5 slots

assign it as a Default Inventory Widget

Play the game and give 5 items

Use them all...should work

Go back and edit widget

move the 5 slots into a different arrangement (vertical, a "X" [two in top corners, one in middle, two in bottom corners]) etc.

play again and give 5 items

Try to use them all...depending on the new layout and how different it is...the issue will crop up again

moving them back to a row again often still keeps them broken

Provide a download link to the bare bones project (strongly recommended if it's an in-game issue, since this helps significantly when attempting to reproduce it; the report will also be given more priority in this case):

It's not really something a pre-made project can properly demonstrate.
You need to be the one making the changes

Slayer

FOR THOSE CURRENTLY DEALING WITH THIS IN THE MEANTIME

If your custom inventory widgets are not allowing you to use items when they are in certain slots, chances are one of the two scenarios is applicable in how yours was constructed.

The solution in the meantime is to ensure when making a Custom Inventory widget, that all the item slots are placed at the same time, ideally first so they run in ID sequence from 0001 - [however many you plan to have], and DON'T move them AFTER launching the game.
Finish the widget layout before testing.

If you already have made a inventory thats got some broken slots due to this issue, simply delete the slots from the widet in the widget editor, and add them again.
That should fix the issue.
If not, regrettably you mayhave to build the widget again, but with the slots sequence in mind first.