Know the chord before separating it
Play the intended chord as a block and identify its notes. Then play those same notes one after another in a simple order. A broken chord changes the timing of the notes, not necessarily the underlying harmony. Begin with a comfortable three-note voicing rather than a wide span. Keep the hand relaxed and choose fingering that supports repeated motion without twisting. If you are unsure which notes belong, use a piano diagram as a reference and confirm the chord quality by listening.
Make the subdivision even
Choose a slow pulse and place each note on a counted subdivision. Listen for whether one finger consistently plays louder or arrives late. Practice with a gentle, even touch before adding intentional accents. The highest note may stand out naturally, so decide whether you want it to form a melody-like line. Try the pattern with the left hand playing only the root at the beginning of the measure. If the hands pull apart, reduce the number of right-hand attacks until the shared pulse becomes dependable.
Let chord changes reshape the pattern
When the harmony changes partway through a measure, move to the new chord tones at the correct time instead of finishing an old pattern automatically. Practice the boundary as a short exercise with a measure on either side. Listen to the singer or melody and leave room around important phrase endings. You can alternate broken chords with sustained blocks to create contrast without adding more notes throughout the entire song. A useful pattern serves the harmonic rhythm and phrasing. It should remain flexible enough that the music controls the sequence, rather than the sequence controlling the music.