At home I use an LTE Internet connection (Mikrotik router of course) which uses CGNAT. My source address therefore is one shared on an unpredictable basis with an unknown number of users. What I've found is this forum blocks my IP address if I try to post from my PC, but is quite happy if I post from my Android tablet on the same network. I'm using the PC at the moment and have to connect to Windscribe VPN to be able to post.
Any ideas why it would be inconsistent in this way?