当指定“编译”选项时，正则表达式“忽略大小写”选项不起作用

I have the following very simple regex, which matches HTML tags in a string. I have the case insensitive option set, so that capitalisation of the tags doesn't matter. However, when the 'compiled' option is set, then the 'IgnoreCase' option seems to be ignored.I have the following very simple regex, which m