Authors review are not counted in the approval strategy

Reproduction steps:

• Create a document with 2 approvers Foo and Bar
• Enable the merge approval strategy " Require all approvers to approve (without fallback)"
• Leave the option "Prevent authors from reviewing Change Requests they create" disabled
• Login with Foo and open a new CR for the page created
• Review the CR with Foo and approve it
• Edit the CR again: the review should be invalidated now
• Login with Bar an approve the CR previously created

Expected result:

• Since Foo's review is invalidated and both Foo and Bar are reviewers, the CR shouldn't be ready for merging

Obtained result:

• The CR is already ready for merging: actually, doing same steps but without any review from Foo lead to the same result. Basically only Bar's review is needed