Hi there
I’m having the same problem. I’m using a PNG image for my site logo, retina logo and site icon (which is what the WP backend editor calls it in the “Site Identity” section.)
My site is loosely based upon and built from the “Mason” theme
https://gpsites.co/mason/wp-content/uploads/sites/72/logomark-mason.svg
Although I have deleted the Mason logo in my media library, and i Have uploaded both PNG and SVG versions of my logo to the media library and to the site identify section. the Mason logo is still appearing on mobile.
Also when viewing my site on the desktop
https://sounding-line-data.com/
When I hit CTRL + (to zoom in), once I get to about 175% the logo switches from my sailboat logo back to the Mason logo.
Any thoughts?
Thank you!!
Monica