Hey Sergey,
It is not uncommon to see the orange banner with that warning message when performing intermediate package updates. During the intermediate package updates, several services which are dependent on the application/package you are updating will be scaled down then scaled back up once the application package update completes. If a NDP or Fusion related service gets scaled down during the upgrade, you'll see the banner presented on the DNAC GUI.
It becomes more of a concern if you attempt an update, the update fails and the banner never disappears. That would indicate that a package failed and one of the services were not able to scale back up to a successfully running state. If you are in this state, please proceed with opening a TAC case so they can help root cause the issue and apply the appropriate workaround if necessary.
Best Regards,