When running queries for high-cardinality metrics in the Observe -> Metrics page, the UI becomes completely unresponsive:

• entire page becomes stuck after the query executes
• elements stop responding
• clicking the browser back button triggers a Chrome "Page Unresponsive" message
• clicking refresh shows the refresh circle in the tab, but the page itself remains frozen
• the only way to recover is to close the browser tab completely

It happen for example, when querying a metric like: kube_pod_status_phase, I'm using chrome browser. see screenshot here: https://docs.google.com/document/d/1RlijXRCHpiyWLVg1sdzWib65sgeVIXox-QBIEFnzMYs/edit?usp=sharing

The UI should remain responsive even when querying metrics with very large result sets, I suggest limit the number of returned series - and mention it's limited to X series and maybe suggest using filters.

I think it should be backported to all supported versions as well.