I'm using Word from Office 365, but I think this cursor backspace issue in Word VBA has been around a long time. I found an old post that mentioned some COM Add-Ins, but I had none of them and still had the issue.



So I turned off all my COM Add-Ins under File-> Options then choose Add-ins on the left side and selected COM Add-ins under the Manage drop down box at the bottom of the panel. The VBA editor worked just fine, just as it does in Excel. I then proceeded to start enabling the Add-Ins it listed and found, for me, it was the Grammarly Office Add-In, which in retrospect, makes total sense, since it it checks for errors in real-time, no matter what window you have open for editing in Word.


The old posts mentioned other real-time Add-Ins such as VBA Code Cleaner and Smart Indenter, which I suppose could affect the Excel VBA editor as well.


In any case, look at your COM Add-Ins and check them one by one in the Word VBA Editor. It worked for me.