Slash commands with 2 or more attachment options causes them to delete each other

[TerricolaMalicioso]

Description

In Desktop/PC app, when someone tries to place one attachment the other one gets deleted and vice versa, no error appearing.

Steps to Reproduce

1. Write a command that takes two or more attachment arguments
2. Try to attach both arguments

Expected Behavior

The user should be able to attach both attachments without them getting deleted.

Current Behavior

When you upload one of the attachment arguments, the other one gets deleted, making it impossible for the user to attach both at the same time.

Screenshots/Videos

https://user-images.githubusercontent.com/69606689/182556446-db1beac8-12a3-465e-b2f5-2f606903d4bc.mp4

Client and System Information

Desktop client and browser version as well.

[typpo]

I believe this issue was fixed a while back