Unknown error (modes 1410/1420)
#11
It's not a bug in my view.

--remove shouldn't be used with --salt-file=. (Otherwise, Hashcat will try to append each salt to each hash in left file)

Tip: For easy algos like $salt.$pass or $pass.$salt you don't need to use --salt-file=, simple rules can work perfectly.
#12
Thanks M@LIK.