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Split from Problem with TP900 comfort touch panel.

Yeah... I have encountered myself in the same situation where the template graphics / texts are missing. Not fun. 

Unfortunately I haven't identified the root cause of the issue. Seems random.  (Although, maybe I have associated it with making big changes).

Not even deleting the changes, or rebuilding the entire project seem to help the issue after the project bugs like this. 

However, after working with Siemens HMI's for quite good amount of hours. My recommendation is, backup often, backup enough.  

The only way I have worked around this problem is to archive the project and save it as checkpoint before I am planning to make a big change.

If any of the changes happen to break the HMI project, I just use the latest checkpoint backup, and copy paste my changes from the broken project.

Funny enough, it has worked every time.