The logs are there, just most of the text is invisible. I can see it if I select it with my cursor, and it all shows up when I reload the page.
It usually happens when I open several device pages in new tabs by clicking down the list of device names while holding down CMD. I can’t reproduce this in Chromium, only Firefox Nightly.
I should note that while I normally use the uBlock Origin ad-blocker extension, I have it disabled on balena-cloud.com along with Firefox’s built-in content blocker.