I've encountered an issue whereby the select component of material-ui v4 doesnt display the dropdown when its placed inside the leaflet map sidebar component. However the select dropdown works outside on its own.
I've also tested and found that using material v3 doesn't present this issue.
I've linked the codesandbox below, would appreciate any help into this matter. Thank you!
https://codesandbox.io/s/material-demo-40c6l?file=/mapview.js