Filtering from Specific Host

RouterOS Beginner Basics
1

Hello,
Perhaps this has been answered but couldn’t find a suitable response. I want to block my laptop (196.1.0.16/25) from being able to ping the router on 196.192.141.36…

This doesn’t work
ip firewall filter add chain=input action=drop protocol=icmp src-address=196.1.0.16/25 dst-address=196.192.141.36

This works

ip firewall filter add chain=input action=drop protocol=icmp src-address=196.1.0.0/24 dst-address=196.192.141.36

Please why won’t the first one work? At least it’s works perfect in Cisco IOS