maybe you are getting banned by network nodes, for relaying bad tx to often.,
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
nope
it does not matter , if you keep your bitcoin-core on for few minutes or few hours. this doesnt qualify for increasing banscore.,
nope, doesnt matter.
- Political pressure means that I should decide to support one of the forks
i am not sure, what that means.
- I have a low grade internet connection
doesnt matter, as long as you are connect to internet.
try adding this line in your
bitcoin.confthis line will make sure to get fresh new nodes, when you start your bitcoin-core from builtin nodes list.