I notice that the juz and hizb system is not totally accurate, the starts and ends of some juzs and hizbs are not where they should start or end.
Juz 3 ends in verse 92 for reading mode and verse 100 for mushaf mode. Checked in Quran.com where it ends in verse 92.
Juz 6 end in verse 81 for reading mode and verse 82 for mushaf mode. Quran.com ends in verse 81.
Juz 7 starts at 82 but changes to juz 6 if view modes are changed. Video (https://drive.google.com/file/d/1nQh8b6DWERQf6EvjomyUxcTytVM3tm_w/view?usp=drive_link)
Juz 11 starts at 93 but changes to juz 10 verse 87 if view modes are changed.
Juz 26 should open 46:1 but instead opens to 45:33, viewing mode change also shifts to 45:33 of juz 25.