Yesterday at this time I downloaded the Gift Sync Client to transfer a bunch of gifts, I logged in as usual and provided the steamguard code asked for. When my login went through, it was stuck at "Syncronizing Uncommitted Changes". I figured I'd just transfer the gifts manually. This morning, when I logged onto my Steam Account I got a message stating that "This account has been Hijacked, can't perform any community related actions like: Buying from the market, Chatting or buying from the store" or something like that. I already sent a ticket to steam support with proof of ownership, and I should regain access as soon as they answer. Has anyone else had this issue?

This is my alt account, my main shop is https://dispenser.tf/krisisawesome

For all I know, this might not be dispensers fault. It might be because of bulk game buys, or market sales. My account is not hijacked, as nothing has been taken from the account and I haven't recieved any emails regarding account changes.

This was using the old Gift Sync Client, not the recently updated one.

This looks like a Steam protection mechanism rather than being 'banned'. If you explain the situation to them they should unlock your account. I don't think this is triggered by the sync client as the sync client just works like another 'browser' login.