Do you run Docker? Because I remember having to VPN out to a client that used that range, and it caused conflicts where our docker containers couldn't reach the client side to fetch data.
Docker defaults to 172.16.0.0/16.
Docker defaults to 172.16.0.0/16.
It was pretty easy to cause myself problems with Docker compose. Eventually I run out of subnets in the 172.16 range and it happily created subnets in the 192.168. range. Some of them overlapped with subnets on my LAN.