I have reported about Logos hanging with simple tasks like taking Notes and Highlighting.
The resource I was working with is John Owen commentary on Hebrews. Perhaps the slowness of Logos in those simple tasks is related to the size of this resource.
Logos 4 is not slow when working with Bibles - I guess that's because the Bible is indexed better and is processed by small chunks in Logos. Therefore window/tab refreshing is faster.
Can the developer look into this to optimize refreshing of windows when working with large resources?