When version 3.3 was released and all the issues starting to show up because of DNSMASQ ?
Basically the date of this Blog entry : https://pi-hole.net/2018/02/14/pi-hole-v3-3-released-its-extra-special/
I am runnig Jessie actually 
Also have a Unify Controller running on it and everything works together just fine!
That's why you guys need to add FreeBSD support : No more silly Debian issues unless you switch to Ubuntu, which has it's own quirks and issues 
Then consider using a different brand or a slightly larger one so it can spread the usage of it's cells 