Inline SVG doesn't work in production

[carstenblt]

I'm using Gatsby v3 with Bootstrap v5. There is an inline SVG that looks like this:

background-image: url(data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3cpath d='M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z'/%3e%3c/svg%3e);

It renders fine in development mode. However in production it changes to

background-image: url(data:image/svg+xml;charset=utf-8,%3Csvg fill='%23fff' viewBox='0 0 16 16'%3E%3Cpath d='M11.354 1.646a.5.5 0 0 1 0 .708L5.707 8l5.647 5.646a.5.5 0 0 1-.708.708l-6-6a.5.5 0 0 1 0-.708l6-6a.5.5 0 0 1 .708 0z'/%3E%3C/svg%3E);

which doesn't work anymore. Somehow sass butchers it.

What can I do?