Repro case with a master build: https://codesandbox.io/s/stoic-mcnulty-dhygf?file=/src/App.js:668-703

Expected: we see content after a second.
Actual: fallback never resolves.

This happens in a sequence of:

1. Normal update
   - which suspends
2. Idle update
   - which also suspends
3. An unrelated normal update immediately followed by a ping (so they're batched)
   - here, we decide to stay on fallback, but should've shown the content

If you remove `_setVersion(v => v + 1);` on line 44 then the issue goes away.
= workInProgress.child;
          workInProgress.child = null;
        } else {
           
           
           = ContentRow.sibling;
          ContentRow.sibling = null;
        }
        initSuspenseListRenderState(
          workInProgress,
          false,  
          ,
          ContentRow,
          Mode,
          workInProgress.Effect,
        );
        break;
      }
      case 'backwards': {
         
         
         
         
        let  = null;
        let row = workInProgress.child;
        workInProgress.child = null;
        while (row !== null) {
          const currentRow = row.alternate;
           
          if (currentRow !== null && findFirstSuspended(currentRow) === null) {