There is only one difference we had to specifically do for chrome https://github.com/mattermost/react-window/blob/f8b7c8333c3c8e80f0fc80b95c45c56361b26253/src/createListComponent.js#L195 because of an issue with optimisations chrome internally does. I have to check back if it is fixed.
What version are you on @LittleBobbyLikesChat. I can give a custom build with the fix on top of your existing version. If you @stnz or you are interested in verifying it.