Unexpected characters in the Application Insights Trace

- Create a function App with Application Insight configured.
- Create an http triggerd function and add the following code to the function.

```
for(int i = 0; i < 200; i++){
log.LogInformation("会員コード, ステータス");
}
```
- Execute the function
- Open the associated Application Insight resource-> Logs ->Traces
- Go through all the rows to find unexpected characters in the Trace as seen in the screenshot below.


Reproduce the C# HTTP-triggered function with Application Insights enabled, logging the Japanese text repeatedly as described. Inspect the associated Application Insights resource under Logs > Traces and compare the displayed characters with the original message; done means the trace rows show the logged text without unexpected characters.

Written by the indexing model from the issue text.