The last time my QHY174M worked with INDI was around the start of January. Now whenever I update the temperature it kills the camera connection. So I think it might be related to
github.com/indilib/indi-3rdparty/commit/...7037c83cc86a28b7c105
which was released after the last good build I had running.
The prove this, and get my camera running, I'm trying to revert the indi-qhy and libqhy packages on Ubuntu bionic amd64.
Specifically:
indi-qhy - 2.6~201911160119~ubuntu18.04.1
libqhy - 6.0.5+stable~201911152326~ubuntu18.04.1
However only the last 3 packages are kept on the update site, and there have been 4 updates since.