[Bugfix] Prevent padding placeholders from reaching embeddings (#47029)
Signed-off-by: qianlihuang <91178480+qianlihuang@users.noreply.github.com>
Signed-off-by: Yiliu Dong <91178480+qianlihuang@users.noreply.github.com>
Signed-off-by: Nick Hill <nickhill123@gmail.com>
Co-authored-by: Nick Hill <nickhill123@gmail.com>