[LH690] Ignore spelling apparently non-functional

Just downloaded the Windows 2.9.0.3 x64 Beta on 3-19-18.
Was going through the tutorial and in the Key Concepts section I noted that corkboard was red squiggled as a misspelling. So I right clicked and selected “ignore spelling”. The contextual menu obliged by going away but forgot to un-squiggle the text - repeatedly.
I did a search in the beta archives since this seemed so obvious but could only find where the feature was announced.

Thanks. This has been filed. The same issue also affects “Add to Dictionary”. For now refreshing the document (loading a different document in the editor and then returning to the first document) removes the red line, but it will not be remembered when the project is closed and reopened.