Octoprint running really slow

What is the problem?
Octoprint interface is really slow. I open a new window and it works for maybe a minute, then it gets really slow, won't load anything, etc. When I refresh the page from that state, it says "loading failed: socket connection failed..." Opening a new tab will allow it to load, but refreshing the page does not.

What did you already try to solve it?
I am stuck on what to do. I haven't had this issue before.

Logs (syslog, dmesg, ... no logs, no support)
octolog.log (122.9 KB)
Attached is my octoprint log.

Additional information about your network (Hardware you are trying to connect to, hardware you are trying to connect from, router, access point, used operating systems, ...)
I'm running Octopi on a Pi 3 Model B Rev 1.2, and the firmware version is 1.4.0. Trying to connect from my computer running chrome.