Is it a Due Process violation, 1 to apply a 2023, decision (Howell v. State.) 2 case holding, that abolishment of the exception to Mississippi 's procedural rule UPCCRA, to a pending case that was originally filed July 14, 2020?

The Mississippi Supreme Court refused to address the issue, despite Mississippi Supreme Court made the decision to abolish the exceptions to their Mississippi 3 procedural bars. Brown argues: that he has been deprived of any avenue of review for correcting constitutional errors that would vitiate the validity of his conviction and sentence without a notice. Thus, this is a clear Due Process violation that Mississippi Courts caused, 4

Is it a Due Process violation, to apply a 2023 decision (Howell v. State.) case holding, that abolishment of the exception to Mississippi's procedural rule UPCCRA, to a pending case that was originally filed July 14, 2020?