Are there any problems in particular you're thinking of?
It seems that several users here use the Gospel Library mobile app, either exclusively or most of the time. It's not always clear what the person is using. I use the browser version most of the time.
Some of them, yes. Also, from my work on the LDSorg Response Team, I have also found that some plug-ins and add-ons, including some anti-virus or malware type programs, can also interfere with functioning of the online study tools, as well as browsers that have not been updated for a while.