I posted a topic about this. It is happening to some people and it seems to only affect tags with more than 100K photos in them. I have contacted Instagram support about this, but no reply, and the issue is not documented ANYWHERE that I can find.
Someone said that if you had at least once a photo removed by instagram because someone thought it was inappropriate then Instagram punished you this way (...) I had a photo of two girls dancing at the pagan Beltane festival in Edinburgh, someone thought it was not appropriate and the photo was removed (and it had nothing pornographic or offensive about it!). Anyway, if you all had at least a photo removed, that may be the reason. What I don't understand is why this is NOT documented anywhere. Also, very disappointed with Instagram support. Really AWFUL.
#hashtagsnotworking only started to happen AFTER #facebook took over. I think the company should reply. 20% of mine work. I believe it might have something to do with the popularity ... as it takes off, it cant handle the load!
i LOVE MY ISLAND and my pics are about what I feel for my country. everything was ok with tagstagram online, I was copying the tags without any pb until I bought the app yesterday ..strange isn't it????