Hi @Dominic_Duclos,
Unfortunately a new option to add sections in the mobile app wasn’t launched at the same time the capability to create sections adding colon was deprecated.
I apologize this change has affect your workflow.
For context, the deprecation of sections creation using “:” was necessary in order to implement Switching projects from Boards to List View (and vice versa) .
Thanks for sharing your report. I went ahead and made a note of of it to our product team.