VR5: When upgrade VR5 firmware from v3.10 to v3.21, seems progress is stuck and wait a long time?

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VR5: When upgrade VR5 firmware from v3.10 to v3.21, seems progress is stuck and wait a long time?
There is a bug when VR5 calculate the module update time, it only calculate certain modules' update time required, it does not count all of the modules correctly This issue has been fixed under v3.35 release Right now, you will see the total firmware update time is about 8~50min.