`AuditLogQuery.SetUserPrincipalNameFilters()` weird behavior

[epigone707]

Describe the bug

I have some audit log records whose userprincipalname=SHAREPONT/system. However, when I use SetUserPrincipalNameFilters() to set a “SHAREPONT//system” (double backslash to escape) filter, the query then returns no record.

And I’ve checked the filter is indeed “SHAREPONT/system” using getAuditLogQueryById endpoint and GetUserPrincipalNameFilters().

Then when I set UPN filter to be "system", the query returns those records whose UPN=“SHAREPONT/system”

Is this normal?

Expected behavior

use SetUserPrincipalNameFilters() to set a “SHAREPONT/system” filter, the query should return the records.

How to reproduce

Has described in previous section.

SDK Version

0.107.0

Latest version known to work for scenario above?

No response

Known Workarounds

No response

Debug output

Click to expand log

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### Configuration

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### Other information

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