2023.6.2 update breaks dashboards - “Custom-element doesn’t exist.”

Thank you in advance for your support, and I look forward to your comments!

After applying 2023.6.2, our default and dwains dashboards will not load and display “Custom-element doesn’t exist.”

We tried several different browsers, dumping cache, and refreshing, but still received the “Custom-element doesn’t exist.” message and no dashboards.

We rolled back to 2023.6.1 to recover the dashboards.

I’m having the same issue. Just upgraded from 2023.5 to 2023.6.3.
Custom elements do mostly work but not when accessing HA from Chrome desktop via my domain. Hard reload and clearing cookies did not help. However it works on all other browsers (+ mobile).

Just found out it also works on a different Chrome profile.