There is a serious issue with the flow of information in healthcare, (or at least in the U.S, I never worked elsewhere to know if it's any different). But If you find something during your shift which will be important to know later on, it will certainly be lost as soon as you are off for a few days, or even as soon as a new nurse comes on. To think of a somewhat crude example, if you find out that it is much easier to obtain a blood sample from the veins on the left arm of a patients vs the right, many nurses will still stick the right arm countless times hoping to get something.
And you can leave a chart note about things like that or speak about it during report, but for the most part few people will think "hm, I wonder what everybody else had to deal with." They are probably too busy handling a thousand different things happening all at once. And, even if that is not the case, from what I observed it's simply not part of how things are done. And very often patients will get (justifiably) angry, saying "I've been complaining of x thing for days!" or some version of that. I think it would be much better for both patients and healthcare staff alike if there was a greater emphasis placed on focusing on the series of successes and failures that happen over the course of someone's care, not just seeing it as a single shift or a single problem happening in some isolated point in time.