Bug with vue router

Hello,

I have a strange behavior with my VueJS front app.

I load the app, all works fine and all links in the navigation menu work fine.

If I wait for a moment (I really don't know how long), some link in the navigation bar doesn't work any more. And it's never the same linke.

I have checked in the network devtool and when I click on the no working link, no API is called. So the behavior is like I would not have clicked anywhere.

I have thought about the possible causes and I really have no idea.

Thanks to help me how to analyse this problem ;).