SharePoint search not working

[SusanMcClements]

We have had Delve off in our environment. Yesterday we noticed that our SharePoint search wasn't working. Empty not suggestions and didn't do anything. It also wouldn't work searching within sites. However in other applications such as Teams, Outlook the search would work. We turned on Delve to see if it fixed issue and today the SharePoint search is working again. Was a change made with Graph and search? Has anyone else had similar behavior. 

When Delve was off, this search box was blank. It had worked previously until we pushed out a Microsoft Update yesterday. Then turning on Delve allowed the search in SharePoint to work again. 

[#2]

@SusanMcClements there was a service alert message about search not working for some users. 

I recommend you sign up for SPO alerts from Admin portal. If any, ask the global adm to add your email so you can receive service outage notifications. 

Here’s the Search alert message that I received from Microsoft: 

Some users intermittently may not receive search results in SharePoint OnlineID: SP497254

StatusInvestigating 

Impacted servicesSharePoint Online 

DetailsTitle: Some users intermittently may not receive search results in SharePoint Online

User Impact: Users intermittently may not receive search results in SharePoint Online.

Current status: We're investigating a potential issue and checking for impact to…