There's something weird happening. imgur shows straight red on my 2015 Macbook Pro, but my iPhone 7 shows the logo. The dropbox thumbnail link (with ?dl=0) sh

There's something weird happening. imgur shows straight red on my 2015 Macbook Pro, but my iPhone 7 shows the logo. The dropbox thumbnail link (with ?dl=0) shows the logo. Opening the link with ?dl=1 in Preview shows straight red. I think Dropbox is doing some weird thumbnail processing.