18.04.4 lts 32-bit intel system cannot unlock encrypted luks root filesystem after upgrade to 5.4.0-42 HWE kernel from 5.3.0-62

18.04.4 lts 32-bit intel system cannot unlock encrypted luks root filesystem after upgrade to 5.4.0-42 HWE kernel from 5.3.0-62.
reverting to 5.3.0-62 encryption makes the password work again.
Need help.
This root encryption setup has worked for me since 12.04 lts.