Sorry for late reply.
Regarding the issues on above, please try to update the following files below :
1. /jnews/class/Module/ModuleQuery.php with this one https://pastebin.com/QZWYELSB
2. /jnews/class/Comment/CommentNumber.php with this one https://pastebin.com/4yEXpkxy
3. /jnews/class/Comment/CommentProcess.php with this one https://pastebin.com/yhhYvr1z
Also, can you help me to provide me your system status report? You can find it on the JNews > System Status and then copy the content of System Report. We need this report for further investigating this problem on our side.
Let us know if the problem still occurs or not.