have you whitelisted any node which relays bad txs ?
try checking your debug.log file's last 200 lines.,
you will see what is happeing .,
- I'm running a part time node
it does not matter , if you keep your bitcoin-core on for few minutes or few hours. this doesnt qualify for increasing banscore.,
- I'm still on 0.14.1
nope, doesnt matter.
- Political pressure means that I should decide to support one of the forks
- I have a low grade internet connection
doesnt matter, as long as you are connect to internet.
try adding this line in your bitcoin.conf