Comment 13 for bug 1969315

I've just tried on a xubuntu live session in a VM and there is no such issue, so maybe something which has to do the environment?

Could you try to install https://launchpad.net/~ci-train-ppa-service/+archive/ubuntu/4816-deletedppa/+build/23500684/+files/transmission-gtk-dbgsym_3.00-2ubuntu2_amd64.ddeb and get a valgrind log while triggering the issue?

https://wiki.ubuntu.com/Valgrind