I noticed this my self and other also have the same issue.

It happens to some people more then other that NPs, resource notes and monsters not appier.

My self i had an empty of NPs tower of healing on oldin and the NPs where there for marbled, relogging I got the NPs back on oldin.

What i think is happening is that we loose a lot of data packages send from the surver, which don't arrive on the client.

I think as a precortion packages should have the time stamp of the last resieved and last send data package.if then some go missing they can be re requested.