I've got a Liferay DXP with an empty portal-ext.properties and a custom empty theme too (empty main.js and empty _custom.scss, default *.ftl files).
My problem is that only in IE11, every time I browse my portal pages, I have to wait 18 seconds per page to have aui.css loaded.
On Chrome or Firefox I have to wait that time only the first time when I start the Tomcat server: after that first load (where, I guess, caches are stored somewhere), calling every page takes few milliseconds...but in IE11 I have to wait 18 secs at every page change!
aui.css is called by IE11 three times, with different parameters:
The last one every time takes so long.
This problem seems to be related to font awesome load inside the font-awesome.scss file:
Its content is the following (bootstrap import is commented by default, I don't know why):
If I comment out the "icons-alloy" import, the problem disappears, but I need font awesome because I use them in my theme.