Status report:
I've had a chance to set up one of the wallets on my Ubuntu VM (still on the same physical PC.) Both wallets are capable of sending payments to starblocks.acinq.co, but still have trouble sending payments to each other. I wasn't using VPN when I created the first requests, so I tried again. For the second test I turned VPN on the primary OS and on the VM, and confirmed both had different IPs. I didn't expect this to solve the issue, but I figured it was worth the experiment.


I'm wondering if this is an issue with Electrum itself, and not the fact that I'm using the wallets on the same computer. Would one of you be so kind as to help me test this theory? Here's a testnet request for 100 satoshis, please only only use Electrum to fill this request.
lntb10u1p085ne6pp5rx5s46gw2ygwv3vzm8cxnnpjgrafem67xuvgpkhepu5uaq6uqgkqdzq2fjhzat9wd6zqen0wgsxsetvwqsxvun0d5syy6t5vdhkjmn5v9kxkgrdv4kkyetjcqzynxqyz5vqrzjq027z73uyyl7fy8pkrpcn7x0el82pz3fw974p2052de4uz4j5lqqxxtly5qqqmqqqqqqqqlgqqqqqqgq9qqpl4tgpvlc6eylpqj0z7h29kl0ss3x3xepruz0j2j4kkl4hekms49m3ha7hsw74elle76mpaqs0uum3gs4zvy3rf9kf0e5urgdljcssq84pfnl
One other test I will do when I have time is to close the channels, and open another while connected to VPN. I'm not sure if my IP as anything to do with it, or if I'm barking up the wrong tree.