AE: Some additional fixes since yesterdays merge

I have revisited Suspend / Resume with the help of @sraue who provided the significant debug log, that made visible that i did not leave a streamlock early enough, so FreeStream had to wait (forever).

The second one does only reenumerate when the sinkList is empty.

Please wait with Push until @MartijnKaijser  could test a build @sraue will provide.