Processing items makes you unable to transfer items into or from player inventory.

[Harald Jordfreser]

So i tried processing plastic. Didnt work (Nothing happens), get back to the truck, now i cant transfer the unprocessed material into the truck either.
I relog, and can now transfer items into the truck. So i take the items out again to process plastic - it gets scuffed immediately. Now i cant transfer anything again.

I drive to my house, where i can transfer things into the house inventory, but i can not transfer anything into my player inventory. 
I relog, I can now transfer everything both in and out of my player inventory.

From this i reason that trying to process items disable your ability to transfer any items until you re-log.

 

[Jason]

I know there has been mention of smelting being broken on the last update. I wonder seeing as it appears to work exactly the same, that plastic processing is broken too.

 

[Jason]

So i tried processing plastic. Didnt work (Nothing happens), get back to the truck, now i cant transfer the unprocessed material into the truck either.
I relog, and can now transfer items into the truck. So i take the items out again to process plastic - it gets scuffed immediately. Now i cant transfer anything again.

I drive to my house, where i can transfer things into the house inventory, but i can not transfer anything into my player inventory. 
I relog, I can now transfer everything both in and out of my player inventory.

From this i reason that trying to process items disable your ability to transfer any items until you re-log.

The smelting issue is certainly fixed. Might be worth trying plastic again and seeing if your issue resolved itself too?

 

[DELETER]

Plastic should also been fixed tested few night ago and plastic is working again.