This could be from limited available space on your Google Drive account. 1SE saves your seconds to the Google Drive account you used to log in with.
Another option is to try the ADVANCED CLIPPER SCREEN in the settings. Try toggling this on/off. If you don't see it in the 1SE settings, that's ok. Some devices have it hidden. To reveal these options, press and hold on the “OTHER” heading inside the settings menu of 1SE. Here are the steps to review these options.