"Ignore Grammar" broken?

I am working inside a custom table, inserting custom capitalized text. When I move on to the next portion of the table, the previous table of custom text, even though grammatically correct, has a green line underneath it, indicating that there was a grammar issue present, even though there isn’t one. When I right-click and select “Ignore Grammar”, the line disappears for a split-second and then instantly returns, and I end up in this endless loop of text selection and right-clicking to select “Ignore Grammar” without any resolution. This is getting super frustrating, as the green line is super distracting to me while I am working on this. What else can I do, that I already haven’t done, to resolve this current issue? It seems to think that every single sentence written is a “sentence fragment”, and it also seems to be against any use of proper punctuation.