Describe the bug

Svelte is having buggy behavior with the new svelte:element. The advanced classes (class:foo) do not properly work with props for some reason. I haven't narrowed down why, but I have created a REPL below.

Reproduction

https://svelte.dev/repl/c74f48f8e55445c9b02734145bf78391?version=3.48.0

Workarounds

not using class:foo, and switching to class="{foo ? 'foo' : ''}" (at the cost of missing unused classes)

System Info

N/A

Severity

annoyance