I noticed there is no "fraction done" progress when a task is faulty.
I made a BASH script that suspends all the tasks that behaves like this for a set interval (default = 10 minutes). I hope this helps volunteer-side.
However, on BOINC suspending tasks from a project turns out to be not getting new tasks too. So I suggest to choose a backup project (resource share=0) if you don't have another project for CPU because you won't get new tasks from U@H until you don't choose what to do (abort/resume) with the possible stuck task.
You have to modify boinc_path and boinccmd variables only.

https://pastebin.com/Rui6artX