aspx links are getting redirected to the homepage

Hello,

I have two .aspx links on my website which should link to an external website but always redirect to the homepage.

This is the website: https://momentumjette.be

The links are in the revolution slider on the homepage, ‘VISIT H&H’ and ‘VISIT xooon’ and should link to https://channel.hendersandhazel.com/nl/channel-marketing.aspx?dealer=167060-momentum-brussel and https://channel.xooon.com/nl/channel-marketing.aspx?dealer=167079-xooon-brussel

This worked before but stopped working some time ago. (maybe after updating to wp 4.2.4?)
The other links in the slider work.

It can’t be a slider problem because I’m having the same problem with the same links on other pages. (expo & loft)

Any idea on what this could be? Thx in advance!