Is spotting occurring after taking a tablet EllaOne Is it normal?

Yes, spotting can be caused by taking ellaOne.

Intermenstrual bleeding is an uncommon side effect (may affect more than 1 in 1000 people who have taken this medicine, but may affect up to 1 in 100). They usually last an average of 2-4 days and are referred to as scanty.

You should also be aware that after taking ellaOne, menstrual bleeding may occur a few days earlier or a few days later than expected. In the documentation, the manufacturer states:
"About 7% of women had menstrual bleeding for more than 7 days sooner than expected. Approximately 18.5% of women had a delay of more than 7 days in menstrual bleeding and 4% of women had a delay of more than 20 days."

I encourage you to read:

https://www.gdziepolek.pl/artykuly/tabletka-po-czyli-antykoncepcja-awaryjna

If you experience any other worrying symptoms, I recommend that you contact your doctor. Teleconsultations can be used at:

https://www.gdziepolek.pl/telekonsultacja/z-ginekologiem