Demo Logo Still Appearing on Mobile (iPhone)

I have a staging site using the Wordsmith theme - https://staging2.mowinecellar.com/. I replaced the logo with no problem through customizer. The correct logo shows through customizer on both desktop and mobile. The logo is correct on both desktop and Android phones. However, when using the Rank Math plugin it gives a mobile view that shows the Wordsmith logo. Upon further investigation, I found that Rank Math uses Thum.io with iPhone6 to provide the screenshot. I don't have an iPhone so I couldn't check it. I know your normal solution is to upload a retina logo and then remove it. I did that. I purged my cache, deactivated my cache plugin. I uploaded the retina logo again. The screenshot still shows Wordsmith. I used Chrome Developer tools (but I believe it just resizes the screen) and it shows the right logo for Android and iPhone. I guess the only thing is to view the website through an actual iPhone. Any help would be appreciated.