No, it’s common practice. Sometimes even words that don’t end with e have a long “eu” sound (mostly in children’s songs)

See these examples:

Nursery rhymes with frequent and strong “eu” sounds at the end of verses.

“Adult” song with “eu” sounds in the chorus. In this one the “eu” is sung in a different note than the rest of the word.

The pronunciation of a final ‘e’ follows two rather simple rules:

• If the final ‘e’ is followed by a consonant other than a mute ‘h’, then it must be pronounced and counts as a syllable.

• If not, even at the end of a sentence or before some punctuation, then it is silent.