On both 7th and 13th of May, two different colleagues encountered the same problem. After a day of fieldwork the buttons for Pushing and Synchronizing were unavailable (grey). Normally this means no changes are recognized, despite all the recorded observations.
In one case, the Push-button was available the next day. However, the data of the first day was not uploaded. The data of the second day was uploaded .
In the other case, the colleague added a new object in another layer that triggered the push-button to be visible. The button was available, but it only pushed the object of the next day in that other layer
Both have QField version 4.1.10.
The status page QField Ecosystem Status did not show any is sues .
Were there some issue with QFieldCloud that were not show n here?
Is this a known issue at your side?.
What are possible causes for this data loss?
I also have this problem. Is there any solution to recover the data?
Unfortunately, we cannot find any solution to recover the data.
@sarahstockGIS Which QField version do you use? We start to suspect the 4.1.10 version is causing the problems.
Not a solution but if this happens again, there is way to manually copy the data file or the delta file from your device. That might help preventing data loss.
Open the project in QField, open the side dashboard and click the folder icon in the top right:

That will show you the both the storage location of the project and provides options to manually view the data and the delta files and export them.
@ckuipersatkb Thanks for this feedback.
To avoid data losses it is very good practice to synchronize after a day of fieldwork or finishing a task. You can also enable automatic push to QFieldCloud.
Feel free to always raise a ticket to QFieldCloud. We will happily take care of the request.
Berit
@Jeroen-GroeneBij and @beanzmo Thanks for helping.
We are familiar with this method of export. Since we lost the data, our field workers are sending the data.gpkg before pushing the data. This way we are sure to have a backup for the data.
Unfortunately, I have not yet succeeded in finding the local project folders. This is a screenshot of a project folder. But I cannot find the cloud_projects-folder.
Another question we have and could not find: Does QField store some kind of log which mentions crash-events. For example, I receive messages about Qfield crashes and shuts down, but I have no means to afterwards find the cause. It would be helpful if this is recorded in a log.
I know about the log-messages and the icon that appears in the right upper corner. But that does not seem to report crashes, and I could not find anything in the “log runtime profiler”. Or did I miss something.
Again Thanks a lot!