When adding lyrics, space doesn't add a space - it moves to the next syllable. that's by design, because syllables don't normally have spaces within them. But if you do need to enter a space within a lyric syllable, type Ctrl+Space.
If you continue to have trouble, please attach your score and describe the problem in more detail. Also say what OS and what version of MuseScore.
Comments
When adding lyrics, space doesn't add a space - it moves to the next syllable. that's by design, because syllables don't normally have spaces within them. But if you do need to enter a space within a lyric syllable, type Ctrl+Space.
If you continue to have trouble, please attach your score and describe the problem in more detail. Also say what OS and what version of MuseScore.