Hey there! Please remember that CSF and CMC is not part of cPanel, so we can't say if any changes or updates need to be applied to that software.
I've been running version 98 on my personal machine for a while now and I have not seen any issues with ModSecurity itself. Do you see ModSecurity working outside of those tools? Are there any entries in the Apache log at /etc/apache2/logs/error_log that show an issue with ModSecurity?