Clicking a link with rel="preload" isn't actually loading the new url [Sapper related?]

[diverent2]

Current behavior

Hello there 👋
I'm running a sapper app and I'm basically having a test thats supposed to switch the route in my SPA while keeping the current session alive.
All I do is click a link to another route and my node-server (supposably) does the rest.
Cypress then tells me I've switched the URL as expected

Event:           new url
cypress_runner.js:200230 New url:         http://localhost:3000/card/card-1
cypress_runner.js:200230 Url updated by:  pushState
cypress_runner.js:200230 Args:            Array(3)

However: My app remains on the same site and the test fails. 😞

After some research Ive found this Stackoverflow Question which explains that my problem seems to be related to the property rel="prefetch" and therefor it appears to be a problem with the node-server.

I've quickly tested this by removing the prefetch and then it works fine. (but I don't want to do this oc).

Desired behavior

I click a link (regardless of using prefetch or not) and Cypress/my app switches to the according url/route.

my requirements

• remaining in the same session of the SPA (that's also why I can't use cy.route())
• not relying on fixtures (if that's something that would come up as a suggestion)

Test code to reproduce

<a rel="prefetch" href="/card/card-1" id="link">my card</a>

describe('Demo', () => {
     it('can navigate to a prefetched link', () => {
         cy.get('#link').click();
     })
})

Versions

System	Version
Cypress	5.3.0
Chrome	86

Thank you for your support/help!