I have my system set to suspend BOINC activity when certain high memory and high CPU applications are running, including occasional gaming. Just now I tried to launch a game and my system lagged severely. On investigation I discovered that while the BOINC client said it had suspended all running work the actual tasks themselves (rebound_boinc_5) were still running.
I run a custom install of BOINC to manage where it saves work data so the number of disk writes do not chew up my SSDs and would rather not have to completely shut down the client to play the odd game due to poorly behaved applications.

I have been noticing this behaviour when the project restarted this year (2024).

When I suspend the project any work units that were in progress keep running in the background.
The BOINC Manager screen says the WU is suspended and the time does not progress, but it is still running and will suddenly go to completed and ready to report when it should not of been running.
If the BOINC Manager then suspends the project itself the same thing happens and work units that were running keep running despite the BOINC Manager saying they are stopped.

It interferes with other projects that are trying to run.

Conan

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https://gaiaathome.eu/gaiaathome/forum_thread.php?id=77&postid=512#512

No specific thread for it but It was mentioned in this one by multiple users.