Does it work if you set useVirtualLayout="false" on the List?
Thanks Shongrunden, been pulling my hair on this one all day. This seems to have fixed all the bugs I was running into. Can't believe it was that simple.
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Be careful when setting useVirtualLayout to false. If you only have a few items in your List or most of the items in your List are visible then it will be fine, but if your List will have many items with only a few on screen at any given time then you will start to see performance problems because every ItemRenderer will be created rather than just enough to cover those in view.
You can find more information on virtual layout here:
Shongrunden, Thanks for the extra tip. I didn't implement anything like rowCount or height that could limit the number of renderers displayed at a time, so no recycling. I guess useVirtualLayout=false should be the right solution for me in this case.
P.S. I do have another question though about recycling, but will post in a different thread.