The system was upgraded from NSX-T 3.1.x or earlier to NSX-T 3.2.x or later.
Prior to the upgrade, some log timestamps were recorded in the configured system timezone.
After the upgrade, all log timestamps are now displayed in UTC.
VMware NSX
This is a by-design change. Starting with NSX-T 3.2.x, log timestamp formats have been unified to UTC.
Changing the timezone for log timestamps is not supported.