Interactive local notifications stopped working

I added some interactive local notifications to my application a few weeks ago. It was great for a while, and suddenly we noticed that the buttons on the notes disappeared. The code was not affected after a while, but picking it today, I checked that the code has not changed. However, the interactive buttons have disappeared. In addition, I tried to paste the sample code from the tutorial, and this code was also unable to create a local push with buttons (it just creates a non-interactive push).

I returned to the history of fixation, but there 3 of us are working on this application, and there are no obvious criminals. Did anyone have this experience before and knew what could happen. What obvious criminals should I check?

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