On mageia linux v8 with:
Linux telaviv1.shlomifish.org 5.4.16-desktop-1.mga8 #1 SMP Wed Jan 29 16:51:15 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

[shlomif@telaviv1 ~]$ /usr/bin/ranger
unknown option -s -O
unknown option -s -O
Unknown option: - 
usage: /usr/bin/python3 [option] ... [-c cmd | -m mod | file | -] [arg] ...
Try `python -h' for more information.
[shlomif@telaviv1 ~]$ head -3 /usr/bin/ranger
#!/usr/bin/python3 -s -O
# This file is part of ranger, the console file manager.  (coding: utf-8)
# License: GNU GPL version 3, see the file "AUTHORS" for details.
[shlomif@telaviv1 ~]$ /usr/bin/python3 -s -O /usr/bin/ranger  # works!
[shlomif@telaviv1 ~]$ 

# happens in a new user too.