UI becomes unresponsive

After upgrade to Nexus 3.18 we have some problem loading the UI.
After a while the UI becomes unresponsive, and a refresh does not work.

When I try to open it in a new tab it is stuck at “Loading baseapp-prod.js”.
It stays like that forever. I have to try loading in a new tab (2-3 times) before it actually starts to load the UI. But I have to close the main tab first or it will never load no matter how many times I try loading in a new tab.

It sounds like this issue: https://issues.sonatype.org/browse/NEXUS-20674

Try upgrading to version 3.18.1.