Describe what you were doing when the bug occurred:

Profiled the new FB. Scrolled down to tail loads.

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DevTools version: 4.6.0-a2fb84beb

Call stack: at chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:345591
    at Array.map (<anonymous>)
    at chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:345397
    at Ai (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:32:62580)
    at zl (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:32:112694)
    at jc (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:32:104789)
    at Oc (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:32:104717)
    at Tc (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:32:104585)
    at gc (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:32:101042)
    at chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:32:47376

Component stack: at chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:344679
    at div
    at div
    at n (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:194307)
    at div
    at Cc (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:346311)
    at div
    at n (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:3:8163)
    at div
    at bc
    at div
    at div
    at div
    at Do (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:262081)
    at chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:364048
    at n (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:274563)
    at chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:277138
    at div
    at div
    at ol (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:323458)
    at Ze (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:205764)
    at pn (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:215038)
    at $a (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:292153)
    at ws (chrome-extension://dnjnjgbfilfphmojnmhliehogmojhclc/build/main.js:40:369231)
throw Error(`Could not find profiling snapshots for root ${rootID}`);
        }
        const filteredCommitData = [];
        const filteredOperations = [];
        
        
        
        
        
        
        
        commitData.forEach((commitDataBackend, commitIndex) => {
          if (commitDataBackend.fiberActualDurations.length > 0) {
            filteredCommitData.push({
              changeDescriptions:
                commitDataBackend.changeDescriptions != null
                  ? new Map(commitDataBackend.changeDescriptions)
                  : null,
              duration: commitDataBackend.duration,
              fiberActualDurations: new Map(
                commitDataBackend.fiberActualDurations,
              ),
              fiberSelfDurations: new Map(commitDataBackend.fiberSelfDurations),
              interactionIDs: commitDataBackend.interactionIDs,
              priorityLevel: commitDataBackend.priorityLevel,
              timestamp: commitDataBackend.timestamp,
            });
            filteredOperations.push(operations[commitIndex]);
          }
        });