iOS 11 UIWebView drop down menus broken on iPad

Number:rdar://35878087 Date Originated:
Status:Open Resolved:No
Product:iOS Product Version:11.1
Classification:iPad Reproducible:Always
UIWebView is not presenting the popover properly for HTML select element. Popover with empty list is shown when we try to dismiss the popover by tapping outside the popover. Sometimes this step results in crash.

Note: iPhone uses UIPickerView which seem to work fine


Steps to Reproduce:
1. Tap on a drop down list in any webpage
2. Click outside dropdown to dismiss 

Expected Results:
Popover should dismiss properly and should never result in crash

Actual Results:
Results in popover being closed and immediately re-presented with empty list
Result in crash once few times.

iOS 11 (15B5078e)


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