Skim/Preview : forward sync not working

I am using Skim to preview pdfs generated by vimtex plugged into MacVim via vim-plug on MacBook Air M1. Whenever I write any changes to my .tex files the pdf opened in Skim does get updated but the display page doesn't move to the updated location. I have set Sync options to MacVim and enabled Check for file changes and Reload automatically options in the Preferences. Can someone help me by suggesting how to reload pdfs to correct page? Alternatively, I tried using Preview but it doesn't even auto-reload until I move focus back to the opened pdf on it. I will be okay with whichever of the two can be made to work properly.