Add to homescreen using WordPress icon

I’ve verified in the manifest json file that the image links are correct, and that they are 192×192 and 512x512px respectively, but my phone serves up the wordpress logo when I get the add to home prompt. I’ve disabled my caching plugin and cdn to no avail

{“name”:”mysite.com”,”short_name”:”mysite”,”icons”:[{“src”:”https://lab.mysite.com/wp-content/uploads/2020/01/app-icon.png”,”sizes”:”192×192″,”type”:”image/png”},{“src”:”https://lab.mysite.com/wp-content/uploads/2020/01/app-splash.png”,”sizes”:”512×512″,”type”:”image/png”}],”background_color”:”#f15f61″,”theme_color”:”#f15f61″,”display”:”standalone”,”orientation”:”portrait”,”start_url”:”./?utm_source=PWAapp”,”scope”:”/”,”gcm_sender_id”:”redacted”}

Any advice appreciated.