we encountered an issue with the multiselect control in Pega 8.6.1. When using a harness that has a header section defined, the selection list of the multiselect control shifts down. The offset between input field and selection is identical to the size of the header.
I confirmed that by removing the header, the multiselect selection is attached to the input field. It seems that the position of the selection is calculated incorrectly, or is based on the wrong HTML element.
I've attached a screenshot of the issue and the harness configuration.
Is this a known issue / is there a known fix to this?