This is usually related to model-driven app sitemap/view configuration or solution synchronization, rather than the view itself being deleted.
I would check the following:
- Open Power Apps → Solutions → your solution → Model-driven app and verify that the affected view is still included in the relevant table configuration.
- Check whether another managed solution or deployment is overwriting the app/sitemap customization. This is especially common if you have multiple environments and regularly deploy solutions.
- Open Manage and share views and confirm that the view itself still exists and hasn't had its access/sharing configuration changed.
- Check the app designer → Sitemap and verify that the table is using the expected view configuration.
- Review recent solution imports, app publishes, and changes to the table/view. If the view disappears after a deployment or publishing operation, that is a strong indication that a solution is reverting the sitemap/app definition.
Since you mentioned that the same views disappear repeatedly and can be added back, I would particularly investigate your ALM/solution deployment process. A solution containing an older version of the model-driven app can overwrite the sitemap and remove views that were added directly in the environment.
I would also avoid making the fix directly in production and leaving it unmanaged. Make the sitemap/view change in the appropriate development solution, publish it, and deploy that solution through your normal pipeline.
If the view actually remains available under Manage and share views but disappears only from the sitemap, then the issue is almost certainly with the model-driven app's sitemap/view configuration, not the view record itself.
