As I mentioned before in another post, I am encountering an ongoing problem when adding tags on iOS. Often, when adding a new tag to a word, the tag I added just before disappears. Or sometimes, the software will add it, only for it to vanish a few seconds later. I have encountered this issue twice tonight.
I am learning Korean and have noticed that the issue seems to occur whenever I had a tag containing Chinese characters to get the Hanja reading.
Can your developer look into this and try to come up with a fix as this is quite annoying.