Thank you for your kind response.
The problem happens to my site and a clone site which is used for inside testing. I am using a custom theme so miybe that’s the issue?
I just don’t see the connection how come I only lose custom sidebar setting in every page. It seem odd to me.
I will run more testing today and let you know if I can find anything.
Btw, is that “_cs_replacements” in “wp_postmeta” table the only I am looking for backup? or there is other values in that table I need to pay attention?