Seeking help with React.js web app map rendering (Pigeon)

Hello all, I’m a newbie web dev who is building a web app in React that takes data from an api and plots the data on a Pigeon map. I wrote some code to allow you to click different markers on the map, and it works flawlessly in Chrome on my desktop. But, when I visit the site on a mobile device, the same clicks cause strange rendering issues, markers disappearing or not being selected as expected.

Can anyone think of a reason this might be behaving as expected on desktop, but not on mobile? I tried it in several different browsers on both.

Web app here: https://iforager.netlify.app

Full code here: https://github.com/CNPratt/iforager-react

Thanks in advance, any suggestions are appreciated! It’s really ‘bugging’ me.