Did the repetition algorithm get tweaked recently? It seems like the pacing went from manageable to unable to keep up again. This is probably the most frustrating thing right now about the app… it’s hard to tell if it’s that a whole bunch of words came up for review or if there have been backend changes affecting the pace of review.
Either way, the pace feels like it changes suddenly and arbitrarily. For a bunch of days, reviewing 150 items a day would keep the number of items to review below 50 or in a place where I can add new words and then suddenly the number of items to review is going up by a couple hundred a day and I just keep falling further behind (unless I have more time to keep it manageable).