sporadic but recurring hotbar(?) item dupe/replace

[shabble]

I've encountered some problem at least 6 or 7 times now (across several versions of SF3 pack) with personal inventory sorting (usually middle-clicking by accident, since I'm using a trackpad) destroying one of my items, and replacing it with a dupe of another item in my inventory.

It doesn't happen often enough (and sometimes I don't notice immediately) to pin down any proximate cause, so any suggestions on ways to debug would be appreciated.

It seems to primarily affect items on my hotbar, and in many (all?) cases I've noticed, it's been duping the item in slot 2 (my RS wireless grid). It always appears to destroy some other item when doing so, which I think is also usually from hotbar (where my nice tools live :()

It has never happened if I disable 'enable middle-click sorting' in the mod-options -> simple inventory sorter config, but I would liek to use it (especially on large chests and other non-player inventories) if I can.

A last note is that it might occur primarily when accessing a modded machine UI that includes the standard player inventory display, and I (mis)-middleclick there. I can't confirm that, and random testing under various conditions hasn't led to reproduction.

Versions:

• minecraft: 1.10.2
• forge: 12.18.3.2215
• inventorysorter: 0.10.5+46
• pack: SkyFactory 3.0.6b

[shabble]

And, as if by divine intervention, I have a repeatable testcase.

Odds are good it only affects RefinedStorage wireless grids, so I'll report there as well, but there's some cross-incompatibility because disabling middle-click sort prevents it from happening.

Steps to reproduce:

1. Refined Storage Wireless Grid in hotbar slot (along with random junk you don't want to keep)
2. Open grid (R-click)
3. middle-click anywhere on hotbar with grid GUI open.
4. hotbar is somewhat re-sorted, and a duped wireless grid should appear. It may or may not (not sure exactly when) destroy some other hotbar item, possibly if there isn't space?

it's not 100% reproducible (maybe only if sorting actually happens, or onlly if sorting would try to move the grid from it's current slot?), but with a bit of fiddling, it's quite reliable.

I can test further if it's not reproducible elsewhere.

[ghost]

I've had it happen without the grid (although RF was installed) on several different mod packs. Today I was on a modified Sky Factory 3 and my sword and an unknown item were replaced with duped Tiny Progressions watering cans (none of them were in my hotbar).

[cpw]

Closing. If this happens with 1.12, I'll revisit. It might be a thread problem, or a filtering issue.