dustyyy/fabrik — comment on commit d2c89c9b71dfedd3525c6622ed3586c28d058b0b
File:  line 0
By dustyyy:

you should be able to replicate this problem by disabling sef urls and trying to group by twice. once you have something grouped once it should break on the 2nd attempt to group by due to the lack of a "?" to start the querystring in the group by link