Is this a test malfunction?

Marie

Sorry for TMI - I went to take a pregnancy test yesterday and I had only a few drops of urine so the test end turned pink but the dye didn’t start to move across the window so I presumed it had not worked.

Later when I had drank more I used the same test and this time the dye moved immediately and showed a positive.

Do you think it is possible the test malfunctioned and it is a false positive?