American chocolates (like Hershey’s) tend to taste more sour because they have more sugar and less cacao. The milk also tends to have a more butyric acid taste for some reason. Perhaps the difference is how the milk is treated, but those are trade secrets.
WebP can be lossless or lossy compression. However, it is not easily apparent which compression mode is used for a given WebP file.
Google says lossy WebP is 25 percent smaller than JPEG and lossless WebP is 25 percent smaller than PNG.
Are you talking about addresses like 192.168.x.x? Do you have subnet routing enabled in Tailscale?
A lot of dark chocolate on the market contain milk even though they are not supposed to since they are processed with the same equipment. Some brands list milk in their dark chocolate ingredient label. Perhaps OP is very sensitive to that certain sour flavour.