Google calendar on Android not syncing, what process is responsible for syncing?

Question

Google

More precisely, the synchronization itself takes place, that is, in the account settings, the time for successful synchronization changes. But in the application itself, new events do not appear until you press the update button in the application itself. Moreover, new events do not appear not only in the google calendar, but also in the standard Samsung S Planner calendar, because it also synchronizes with a google account.
As a result, in order for the events to appear, you need to press the "Update" button in the application, then everything is synchronized.
I emphasize that this does not always happen, that is, sometimes synchronization is performed.
I can not understand why the Google calendar stopped syncing. How is it happening. In the synchronization settings menu (this is where the checkboxes for Google services are), the synchronization ticker is ticking, that is, the time of the last synchronization changes, but events do not appear in the application itself. But if in the "sync settings" menu it is forced to synchronize all Google services, or just uncheck, check the calendar, then new events will appear in the application.

Answer 1

This method helped:
"Try in the file manager (for example® Root Explorer (File Manager)) remove all permissions from the folder and file" / system / priv-app / GoogleServicesFramework ". Then, in the folder" / data / dalvik-cache / arm " delete files associated with GoogleServicesFramework (something like [email protected]@[email protected]@classes.dex), or just clear dalvik-cache from custom Recovery. Restart the device and clean other tails from GoogleServicesFramework (for example, in program® SD Maid - Cleaning the system.)
Then return the permissions to the folder / file (folder 775, file 644) and restart the device.
You may need to do the same for Google Play Services and Market. Although if the services and the Market are updated, it will be enough to remove their updates. Checkboxes (checkmarks) should be enabled by default.
Settings (accounting, synchronization, etc.) will of course have to be done again. "

Answer 2

Google Services Framework and Google Play Services
Try to forcibly stop them, clear the cache and data, and restart the device.