Child element Docking and Stacking not working on Alpha channel

Same theme has different appearances on ATVO 1.16.1.0 and 1.16.1.1. On the attached screenshots, each line is a SubWidget. The yellow text is one Label, the white text is another Label.

Affects only ATVO; Theme Editor displays the stacking correctly in both versions.

Thanks, this should be fixed in 1.17.