TOC not displaying properly

When I try the following in a page:

= Level 1

{{toc start=1 depth=3 numbered=false scope=page /}}

== Level 2a

=== Level 3a

=== Level 3b

== Level 2b

=== Level 3c

[Level 2b] does not "untab" itself in the TOC. This only happens when there are 2 or more children preceding the parent's siblings (i.e. if [Level 3b] did not exist, this would work properly).