I was trying to fix another web browser problem on my PC last week, so cleared the cache, and ever since then when I use Google Maps the icons don't appear. The funny thing is clearing the cache didn't fix the other problem either. The same behavior occurs on both the Chrome and Edge browsers.
Here's a screen capture to show you what I'm talking about:
Attachment 510534
My guess is clearing the cache cleared those images from the cache, but I don't understand why they wouldn't reload when I refresh the web site. I haven't noticed this for any other site. Just plain weird.