I'm pretty sure that's because you have an SNAT rule in your iptables (or an snat rule in your nftables) that sets the source IP to 164.X.X.X for traffics from 10.114.0.0/20 (or, all traffics, so to speak).
Solutions would be:
- adding
! -o loto the rule, or - adding
-o eth0to the rule (assuming the interface name is "static")