In the ARIA 1.2 Spec for Role Presentation Example 9 has the following example:
<!-- 3. Depending on styling and other factors, this role declaration is redundant in some implementations. --> <span role="presentation"> Sample Content </span>

I am finding a lot of seemingly unnecessary uses of role presentation/none on non-semantic elements in the wild and when accessibility testing. The 'Depending on styling and other factors' has no further explanation as to why styling or factors would require this role.

I have read that the Role Presentation/None can be used as a bug fix, but can't remember what it fixes.

I'd appreciate your opinion on this.