MBP keeps dumping SMB share using Ventura

I've seen variations of this problem without any working solutions.

For the past couple of years, I've networked my MacBook Pro (2021 M1) locally to my Mac Mini M1 (2020) over SMB, using the Mini as a web development server. It's worked well with the Sites folder of the Mini mounted to the MBP as a networked volume I could add/delete files from during testing. Both machines were set up in this configuration with Mojave, and both were updated to Ventura about three weeks ago.

Since then the connection to the Mini has been sporadic, increasingly unstable, and often locking up the Finder with the MBP as it tries to establish a connection and (I'm assuming) mapping the remote volume. I still have a stable connection with Remote Management and Screen Sharing with the Mini, just no SMB.

I've tried basic recipes to clear this up by resetting file sharing on the Mini (restarting each time with FS off, then on), changing the Advanced Options for the remote folders to disable the "Only allow SMB encrypted connections", and even deleting the "com.apple.smb.server.plist" file on my MBP to have the SMB settings reset. Each time I reboot the Mini it will show up in the Network and allow me to connect normally, but this lasts only a few minutes before the connection is broken and requires another reboot of the Mini.

What could be causing SMB to become garbled like this? Is there another solution I'm missing, or is this a terrible bug in Ventura that will require a patch from Apple? I've lost days to this...

Thanks for any suggestions.