Hello! The CSR program on the tablets will report that they are online, however, changes made to volume sliders, mute buttons and source selectors, although visibly changed on the tablet, are not changed in the processor. Restarting CSR on the tablet temporarily solves the problem.
This is not a typical issue. But if it works temporarily and then stops, it could be a result of a flooded control network. I see this is an ESP-880AD. If there are many Dante channels/subscriptions being used on the same network as where the system is being controlled, you could try isolating their respective networks.
If that's not the case, or if that doesn't resolve it- I would recommend re-creating the remote file using the current existing CSD file, or updating it by opening the most current version. Then try re-uploading to the tablet. I hope this helps.