In the original tmux (before prefix + Ctrl-R) , the order of sessions are sorted by three types. Sorted by index, sorted by name and sorted by time.
In tmux 3.1c, sorted by index is the default option.
After resurrect, the index order part is overwrote by name order.
I think it may because the resurrection process re-create the sessions by name order.

Expected behavior:
Support re-creating sessions by index order.