Confused sequence

I have uploaded multiple sequences.

from: 2021_09_10_23_24_57_000
to: 2021_09_11_08_56_14_149

Early sequences exist in duplicate.
for example:
5zJ6G9AbBtkP1gp0Y4WdcM and pdPTHgos2YBuRz3r8VcmNy

Sequences after Sep 11, 2021 3:46 PM are not shown on the map.

What could be the cause?