@pete here is the testing ipks of transmission v3. For me seems to be fully functional, tried distros torrents.
Reup on google disc:
https://drive.google.com/drive/folders/1inJnwvfk7BMAR5v9BiYmIPKBaUfartHo?usp=sharing
After download untar it and via SFTP send it to router.
Here you can use command: opkg install --force-reinstall transmission…
Then reboot or restart daemon service.
You don’t need to install everything what is in the package, transmission-web and transmission-daemon should be enough. But feel free to test the others, if you are using remote and cli as well.
Testing on your own risk! And let me know if it works for you.