Hello!
Why doesn’t it work with timezone 0 (UTC)?
Try to install this zone again and see what messages you have received in Toolbox-Messages. Perhaps you will not immediately see changes directly on the object, since with a time zone of +8, they came with a later time, so the program considers them as the last. See if messages with the correct time will come, if so, then over time they will block your messages with a timezone of +8