Breakpoint on `()` in if branch in async CE not hit

**Repro steps**

Write the following console app, place a breakpoint on `()`, and debug it (in debug mode):

```fsharp
let c x =
async {
if x = "" then
()
}

c "" |> Async.RunSynchronously
```

**Expected behavior**

The breakpoint is hit.

**Actual behavior**

No breakpoint is hit.

**Known workarounds**

Replace `()` by e.g. `ignore 0`.

**Related information**

- .NET SDK 9