magic mouse accuracy - right click in pages

I am using a Magic Mouse 2 in Pages MacOSCatalina MacBook Pro 2019. I have the secondary click set to right hand side. When I click on a spelling mistake in pages (underlined with red text), instead of brining up the dialogue box for spelling correction of that word, the mouse selects text several words along to the right. The track pad does this as well. The only way to get the dialogue box for the word concerned is to select the whole word and then right click on it. Is this something wrong with pages or what? I don't get this kind of problem using Word for Mac.