I used to have problem with default dashboard and long load times, however I think it occurred since the default it was trying to load did no longer exist. When I set “Set default on this device”, the problem disappeared.
However, now, months later, I have problems when connected to a new HA installation. As soon as I attempt to swipe down, HA will refresh and change view. I have two iphones and this happens only on the newer one, with Companion version 2024.9.5 (2024.986). On the older one with version 2024.9.4 (2024.905), this problem does not happen.
(Related issue: iOS Companion App dashboards rapidly refreshing - #2 by danka621)