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Node Eviction after Applying Release Update 19.13

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Be CAREFUL! Before Applying Release Update        After applying release update 19.13 to our standby site cluster, consisting of two physical machines (non Oracle-engineered), we started to experience Node Evictions and Reboot Problems. We immediately started to search for the root cause of the issue and followed some steps to make them stable again before applying RU 19.13 to our production sites.  * We chose a sample that is reflecting the problem. On Feb 22, at 13:35, the host machine(bltdb02) rebooted. * We looked the lastgasp log files to get the details why the node got rebooted. Grid cssdagent or cssdmonitor can record node reboots here.      * This files are in ASCII text file format,   there is nothing worhty of mention except the timestamps. The records in these files were related to another date.