URLConnection.ResponseHeader crashing apps on only Xojo Cloud

Have a test app that runs fine in debug on my machine, and fine on a third party server, but on Xojo Cloud the following line crashes the app without throwing any exceptions:

if theUrlConnection<>nil and theUrlConnection.ResponseHeader("Link") <> "" then

Doesn’t seem to be a way in URLConnection to check if the “Link” header exists, and I assume if doesn’t it’d just return a blank string. Why is this line flat out crashing the app on Xojo Cloud?