i encountered this problem this morning - pc/eu. i used the 'take all' feature of taking system mail, for the ... i forget what they're called ... the guys that bring you mats. anyway, i did that, and then i went to take the gold from my system alerts, which are the sales of guild traders. the gold was gone and i didn't receive it with the mats. fast forward a few minutes ... when i did my daily crafting writs and handed them in, the gold from the system alerts came with the gold from handing in the crafting writs. so, i got the gold in the end, but this is a bug, should come when sifting through the system alerts. it usually does, but there must be interference b/tn the 'take all' feature in system mail
PC - EU - Steam client