Hi @Sterian_Vlad , unfortunately ST’s app is just that slow when you have a lot on your dashboard. There are also other factors that could be impacting you, such as Quick Controls on any of those devices, as well as custom DTH’s that may need updated for the new app.
I’ve removed as much as possible from the Dashboard so it only has to update just a few devices, which are the most important to me. You might want to try the same since that seems to have helped me a lot.