Modsecurity stops working every night

I have been noticing for a while that when I disable and re-enable modsecurity, it starts to block malicious attacks, but after a day there is no more ip blocking, and the logs are completely blank. This made me suspicious, and although in the plesk interface modsecurity is shown as active, I have the feeling that it is not working.

I have created a rule for modsecurity, so that when visiting a url on my server if modsecurity is running it shows error 403, and if it is not it shows error...

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