When will a court reverse a conviction on appeal on the grounds of incompetence of counsel?

Further, "[r]eviewing courts reverse convictions on direct appeal on the ground of incompetence of counsel only if the record on appeal demonstrates there could be no rational tactical purpose for counsel's omissions." (People v. Lucas (1995) 12 Cal.4th 415, 442; see also People v. Anderson (2001) 25 Cal.4th 543, 569 ["When a claim of ineffective assistance is made on direct appeal, and the record does not show the reason for counsel's challenged actions or omissions, the conviction must be affirmed unless there could be no satisfactory explanation."].)