Can anyone explain why all my materials for summoning bosses are gone on Eternal realm (non seasonal)? First time checking since s3 on the character I know had them. My stash has 3 open slots, do they just delete those when season ends or something? I couldn't find an answer via google search.

did you buy those mats?

Think when your char get transfered to eternal. You’re only allowed to keep a certain amount of space in stash. Not all stash

No , didn't look since d3 just left my toons alone.

If the materials were on 1 character even? Can't recall if I stashed them but I know I had like 30 duriel summons available now 0.

All the gear your characters acquired during Season 1 will be placed in a ‘Withdraw Only’ stash in the Eternal Realm.

You’ll be able to access and retrieve these items throughout Season 2, starting from October 17 until the beginning of Season 3.

However, if you fail to collect the gear before Season 3 starts, it will be gone for good!

Here's what i found. quoted from blizzard forum

Was just s3 items , was last time I played before s5.

Well if you djn t qithdraw them, S4 stuff overwrote that temporary stash and most likely you lost all the gear/mats you had in your stash at the end of S3 that wasn t on a character or in it s inventory.

ah so after a season ends you get a stash with all your season stuff and have to withdraw it?

Yes, you have to withdraw your items to eternal after each season, or else next season the new items will delete the old saved stash