Learned brethren,

I have a module that uses Time::Moment to produce timestamps for logging. The timestamps are supposed to be to microsecond accuracy. The code:

time => Time::Moment->now_utc->strftime('%FT%T%6f%Z')
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produces timestamps with six decimal places wherever I use it on Linux and Darwin. This I expect because the doc shows:

%f
Replaced by the fractional second including the preceding decimal point or by an empty string if no fractional seconds are present.

%3f is replaced by decimal point and exactly three fractional digits (zero-padded on the right or truncated if needed) if fractional seconds are present.

I've released a module to the CPAN using this code, and it failed on a Windows tester:

#   at t/013-context.t line 28.
    # Using Regexp on $data->{"time"}
    #    got : '2021-05-01T18:58:28Z'
    # expect : (?^:^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}.\d{0,6}Z$)
    # Looks like you failed 1 test of 1.
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So my question is whether this is something that is known to occur in Strawberry Perl on Windows, or did I make a mistake in reading the doc, or ... ?

Thanks for any suggestions!