await block is not properly removed inside if

[timhall]

When placed inside an {{#if}} block that changes, {{#await}} is not removed. If the if statement flips repeatedly, new {{#await}} blocks are added each time.

Example: https://svelte.technology/repl?version=1.44.1&gist=4006a1c38fff4a0e436e44a0d29110f7