Info

• Server version: Paperclip 1.12.2
• OldCombatMechanics version: Latest src github
• Server log file: https://pastebin.com/J4NcgWsD
• OldCombatMechanics config file: https://pastebin.com/GMaR1WWi

Problem Description

If the sword-block is on, players jump from a height with the sword locked looking down and holding the S key does not die
I apologize for my English, I come from another country

There is no relevant error in the server log. I don't understand what issue you're having but you should first try to update to a newer test version.