@spfeiffer I believe Spacemacs recommends switching off Smooth Scrolling when using Window (although I cant find where I read that, sorry) Also, it may sound like its avoiding the issue, but jumping around in Spacemacs is usually more effective that scrolling (once you get used to it)

I know my vi movement skills still leave much to desire ☺️. And both installations do not have 100% the same config, so the cause may be in there. But thanks for the pointer…