@Long There is an ongoing issue with bing search. As per the latest update on Azure portal:
Last update (2024-05-23T13:14:53.0726817Z)
Impact Statement: Starting at 05:00 UTC on 23 May 2024, customers using Bing Search or Bing Custom Search APIs may experience service disruptions. Affected customers might encounter errors such as HTTP 503 Service Unavailable, HTTP 429 Too Many Requests, or higher than expected latency when performing requests to our service.
Current Status: Additional engineering resources are actively working to resolve this issue as a top priority. Root cause and appropriate mitigation workstreams are in progress. We understand the inconvenience this may cause and appreciate your patience. The next update will be provided in 2 hours or as events warrant.