What is the ruling on not articulating the vowel at the end of a word, such as uttering "Alhamdulillah" without the kasra on the letter Haa?

Not pronouncing the kasra (vowel mark) of the letter "ha" in "Alhamdulillahi" (All praise is due to Allah) in Surat Al-Fatiha, without pausing on it with sukoon (a diacritical mark indicating the absence of a vowel), is considered a linguistic error (lahn) that does not invalidate the prayer because it does not change the meaning. However, this error should be corrected by pronouncing the kasra of the "ha" when it is connected to the word that follows it.