### Describe what you were doing when the bug occurred:
1. I did profiling on a list, that gets updated on each pagination api call.
2. Once the profiling was done, I moved around in the Profiler to view the Flamegraph
3. Moving to second capture, the Profiler crashed.


**DevTools version**: 4.6.0-6cceaeb67

```
Component stack: in ec
    in div
    in div
    in div
    in So
    in Unknown
    in n
    in Unknown
    in div
    in div
    in rl
    in Ze
    in fn
    in Ga
    in _s
```
SESSION_STORAGE_RECORD_CHANGE_DESCRIPTIONS_KEY,
        ) === 'true';
      this._isProfiling = true;
      sessionStorageRemoveItem(SESSION_STORAGE_RECORD_CHANGE_DESCRIPTIONS_KEY);
      sessionStorageRemoveItem(SESSION_STORAGE_RELOAD_AND_PROFILE_KEY);
    }
    const persistedSelectionString = sessionStorageGetItem(
      SESSION_STORAGE_LAST_SELECTION_KEY,
    );
    if (persistedSelectionString != null) {
      this._persistedSelection = JSON.parse(persistedSelectionString);
    }
    this._bridge = bridge;
    bridge.addListener('clearErrorsAndWarnings', this.clearErrorsAndWarnings);
    bridge.addListener('clearErrorsForFiberID', this.clearErrorsForFiberID);
    bridge.addListener('clearWarningsForFiberID', this.clearWarningsForFiberID);
    bridge.addListener('copyElementPath', this.copyElementPath);
    bridge.addListener('deletePath', this.deletePath);
    bridge.addListener('getBridgeProtocol', this.getBridgeProtocol);
    bridge.addListener('getProfilingData', this.getProfilingData);
    bridge.addListener('getProfilingStatus', this.getProfilingStatus);
    bridge.addListener('getOwnersList', this.getOwnersList);
    bridge.addListener('inspectElement', this.inspectElement);
    bridge.addListener('logElementToConsole', this.logElementToConsole);
    bridge.addListener('overrideSuspense', this.overrideSuspense);
    bridge.addListener('overrideValueAtPath', this.overrideValueAtPath);
    bridge.addListener('reloadAndProfile', this.reloadAndProfile);
    bridge.addListener('renamePath', this.renamePath);
    bridge.addListener('setTraceUpdatesEnabled', this.setTraceUpdatesEnabled);
    bridge.addListener('startProfiling', this.startProfiling);