You have complete OS compilation without errors and warnings. During the course of this, the "Create/Update Block Icons..." function was also executed implicitly. Nevertheless, not all the block icons were updated. One reason for this might be that you are using more than 10 template pictures.
Limit your template pictures to a maximum of 10.
More information is available in the WinCC Information System in the path: Options > Options for Process Control > Graphic Object Update Wizard > Example: Creating object templates. A detailed description of how to use template pictures is available in Entry ID 26697820.
PCS7Typicals, @PCS7Typicals, Faceplate