Can't buy from traders

i can't buy anything from traders, whenever I buy the game just buffers and I have to restart the client.

The items do go into my stash after a restart.

I have restarted the server many times with no luck.

alright , i found the item that was bugging my stash out was meldonin.

id like to debug with a clean install but i already updated my eft and i didnt have space to backup.

if you have meldonin in your stash and can still buy and sell normally, do please tell me.