I changed the difficulty from peaceful and then back to normal and then hard, but it didn’t fix the problem. I was told to take it off survival and put it on creative and then back, but that’s when the achievements would be affected.
Still present in 1.11.
I was able to reconvert my old world and some spawners worked. The problem is that I did weeks worth of mining on the first conversion attempt as I waited for the fix. So either I continue to wait for a fix and continue to mine and build on the first conversion, OR I just scrap weeks and weeks worth of progress and start with a new conversion. I have a feeling that original conversions won’t be fixed for a very long time...if ever.