فَإِذَا بَلَغُوا بِهِ قَبْرَهُ: كُرِهَ لِلنَّاسِ أَنْ يَجْلِسُوا قَبْلَ أَنْ يُوضَعَ مِنْ أَعْنَاقِ الرِّجَالِ
Translation: When the procession reaches the grave, it is disliked for people to sit before the bier has been set down from the shoulders of its bearers.
The wording defines the restriction precisely: while the bier remains on the bearers’ shoulders. It is not an unrestricted prohibition on sitting at the cemetery.
Reports about standing or sitting during a procession describe different circumstances; this text addresses the bier still being carried.