Go 12 for iPad Odd Behavior

Has anyone seen this behavior in Go 12?

Simple portal of items on a layout....  Each has portal element has a category assigned (ex, animal, plant, mineral, etc).  There is a global for filtering the portal set as a pop-up of said categories.  Script trigger assigned to the global field to refresh window and commit when field is saved.  Desired effect is to keep Go from hopping to the next field when the global category selector is set.

Instead of the expected effect (click filter global, portal contents adjust, display stays put), Go refreshes correctly but then hops to the top of the layout to the first field and goes into data entry mode with the onscreen keyboard coming to life.

If I omit the commit step in the trigger script, the portal refreshes but the focus flows to the first field in the portal (as expected since the portal is below the global) and the keyboard pops up.

Things behave beautifully in the full fat client with the commit step in place.  Why is Go being a pain in the ass on this simple task?  Anyone seen this?

Thanks