/resolve non-responsive only on one node

[alex-manutd]

Hello, I have two nodes running on the same LAN: 1) Linux Mint using pipenv shell 2) Virtualbox running Pop_OS in bridged mode also in pipenv shell, on top of a Windows 10 base. Both nodes are running a mirror copy of blockchain.py, I copied the file over the LAN. When I run /resolve in Postman in the Pop_OS instance, targeting my Linux Mint node, the request does not register on the target node, like all the other requests do. The target node then becomes unresponsive to any request. I am able to cancel the Postman request in Pop but I cannot make further requests until I reboot blockchain.py in Linux Mint.
Going the other way, Postman on Linux Mint can successfully run /resolve targeting the Pop_OS node. All other transactions work fine in both directions. I am confused because the condition should be consistent both ways with the same code running. EDIT: I cannot even run a localhost:5000/nodes/resolve on the problem machine, in or out of its shell. But I can on the other.. EDIT 2: Cannot run resolve on one of my nodes even with the original source. Removed and reinstalled pip and pipenv shell. Still cannot run it. Works just fine on my other node running in Virtualbox :(