I am a bit late with this reply, but I wanted to say that uploading a lot of observations without an ID on them is something I do often, so my apologies to people who find it a nuisance.
For me it happens because, while I am out in the field, I want to use my time to concentrate on finding interesting organisms, and getting one or more acceptable photos of them. Typing in possible IDs takes up a lot of time, and it can be quite difficult to type in cold weather, rainy weather, windy weather, extremely hot weather, and so on. After an hour or two in extremely cold weather or extremely hot weather, my phone gives up and shuts down until I can warm it up or cool it down, so I have to make the most of what time I have. I also often can’t see the screen very well while I am outdoors (I am 70).
I usually make a lot of observations, then upload them as rapidly as possible on the way home and at home, and then I add IDs on my computer once I am home. Sometimes, if it is dinnertime and I need to cook, that does not happen for an hour or more.