Custom Format Alert Profile not working

Hello!

I am running Uptime IM latest release on a SLES12 server.

I am trying to use custom variables to format my alert profiles. I have added some of the valid tags to my alert profile and saved it. But it is not working, I still get the standard medium template. On the over view screen of the profile I can see the Changes are made, but there is also a value set to "no" on "using custom format". I am not finding anywhere to make this a "yes" and it is not covered in the manual.

 

Advice please.