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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(169.60000000000002, 5%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAK%3C/text%3E%3C/svg%3E)
Contrary to what is described in the docs (see green box "Tip") using the type "RegularExpression" to match a header value does not work. It seems that ANY value is accepted no matter what kind of regular expression I use (even if it is characters only like "foo"). In fact, it doesn't even check if a header exists at all. As soon as I switch the type to "Exact", everything works as expected.