Recently I started using templates for my projects and I did this by editing the existing jazz production template.
In the project I created with this, I cannot set or reset a marker by clicking and holding the mouse in one of the appropriate boxes named 1-8 in the taskbar.
The box turns momentarily into green but no marker is set or reset.
When I do this on another project not created with the template it works fine.
Is there a setting somewhere that needs to be checked?
to be honest I just realised that this behaviour is met in some tracks and in others not.
That is, the template has nothing to do with it, it was a coincidence and I am sorry for the confusion.
So, in some projects click+hold sets and resets a new or existing marker respectively and in some others it does not.
I have not yet found out what is the difference between those projects.
I also realised that the cc121 has nothing to do with it also, since it happens with it either on or off.