I really dont think its a bug , i really feel its not ! . the so called controller players reporting it come to find out after reading there post most were using playstation but also mention they had mouse and keyboard plugged in and it was picking up the input thats why they got the msg.
But theres a way to fix it but its just gona take some time to relearn some muscle memory and get use to it but now I no longer get the input detect on screen... Downside is im still kinda slow while moving my inventory around but getting quicker at it. For mods that mention they really dont play this game, i know it might not seem like a big deal cause were not getting kicked, but i dont think they realize how big the inventory is , its one of those things in this game that the quicker we can get in and rearrange the safer will be.
THE FIX: So instead of using wasd to move inventory , cause this is the only time this pop input msg appears is when youre in inventory.. Insteasd of using wasd use what ever keys you have assigned to your dpad , the dpad wont detect the fast movement.
But like i said, its just takes some getting use to , you kinda gotta force yourself to relearn moving your inventory around.. plenty of times in a hot situation where u just wana go to inventory and move it around quickly. It felt very slow to me at first.
So a quick tip that worked for me i recommend is.. if you have a keyboard with onboard memory that way you can remap keys and have multiplie keybinds . maybe remap some others keys that you use as the same as your dpad so you have more than one option on your keyboard or mouse. Just something that feels good for you while your in your inventory.