The "auto update" check button in the log screen doesn't seem to work properly

[dcorsus]

If I start HS4 and the auto-update is not set, it works as it should ie no new log entries show up.
If I enable the auto-update, that also works.
If I now turn off auto-update, that doesn't seem to work and updates are still showing in the log file
I'm on v20
rjh