I opened this thread ages ago. For others that have added to the thread, though the Utilitia people on the community are I'm sure well meaning, they dont have any "clout", their reports are no different to you telling an agent in telephone or chat. I am an IT consultant - I know how this generally works.
Unfortunately this issue will never be fixed properly, as I don't beleive any software engineer has ever truly looked at it. It is highly likely an issue in the app. It'll be what's known in the trade as an edge case, corner case, and is "difficult to reproduce". There will be a low priority JIRA /defect open somewhere. Likely the software for the app is outsourced, and Utilitia just take what they are given.
Long and short, its not costing Utilita money, impacting a relatively small number of people. So is not a high priority defect. The low priority defects almost never get fixed unless it is trivial and requires almost zero engineering effort.
My own smart display is now completely disconnected, never worked properly, and now I am told I need a new comms hub (4th one!). That will be installed on 27th July, hopefully, and then I'll revisit this issue, but for now I don't expect it to work.