I had been using the AutoSuggest UI from past 2months and i was not receiving any error. today it was giving me CORS policy error on typing on the input box. I had also tested the sample code from the bing development sdk(https://www.bing.com/api/maps/sdk/mapcontrol/isdk/autosuggestui) and checked in the localhost it is still the same error where previously i did use the same code when building. Below is the error log for your references.
Access to XMLHttpRequest at 'https://www.bing.com/api/v6/Places/AutoSuggest?q=dallas&appid=************&mv8cid=*****************&mv8ig=&localMapView=,,,&localcircularview=1,100&count=4&structuredaddress=true&types=place,address&setmkt=en-IN&setlang=en-IN&histcnt=&favcnt=&clientid=' from origin 'https://localhost:' has been blocked by CORS policy: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.
Thanks,
Prajwal