About Google AppsScript Project Trigger Settings Defects

Code created by the Script Editor function of the spreadsheet Failed to run at the time set in Triggering Current Project

On November 5, 2018, I clicked
Triggering Current Project
The G Suite Developer Hub configuration screen appears.

Since then, it has run seven hours before the configured time.
(The source of the event is 主導time-driven 型 and the trigger type is
　
Date-based timers,
if the time is between 6:00 and 7:00 a.m. 　It runs between 23:00 and midnight every day.)

I would like you to answer the following three questions.
①Reproducibility (are other similar symptoms occurring)
②Workaround (Is there a way to fix the time lag issue?)
③Contact information (I would like to contact a page that supports Japanese, but
　　　　　　　　I don't know where to go)

Thank you for your cooperation.