Okay, I will try to make a video, though i've never recorded my gameplay before so ill have to figure it out, and get back to you, and yes i am 100% positive items armor/weapons are disappearing, ive lost tons of items due to this issue
blue items are now disappearing as well it happens whenever there is a large group of items on the ground such as bosses, rare demons, treasure trolls, chests etc, for example, I just killed a treasure troll, about 5 blues, 2 gems, and 3 yellows dropped. I was only able to pick up 1 yellow and 1 blue before it all disappeared. I now have to pick up loot as fast as possible without even trying to look at it before it disappears even though most of it still disappears before i can click it....this is an utter pain in my rectal region...
I am 100% aware of the alt key, the loot doesn't just stop displaying, it completely disappears from the game, im only level 50 or so, I have not done any rift things yet, havent even beaten the game yet so i'm confident thats not it.
I'm not exactly sure what to do at this point but it feels pointless continuing, i beat azmodan and only picked up maybe 3 items that he dropped before everything but the gold vanished.... it literally disappears within 3 seconds of dropping quite bothersome considering i just bought the game
rares and legendary items are disappearing within seconds of defeating a boss before i can grab them all, It only recently started around level 40 but persists even now at 47. it happens with main bosses and rare monsters. Grey, white, blue items all remain in place until i pick them up, but clearly there is a bug causing legendary and rare items to disappear after just a couple of seconds upon the boss kill. Yes I know how the alt button works ;-) this issue is rather frustrating, ive lost 2 legendaries and about 15 rares so far