Hi Bert,
I just tried it again and it worked for me.
1. I selected the Piano track - (P) in image below.

2. When AutoSet Clefs was active, the score looked like the below.

3. When I deactivated the AutoSet Clefs and only had a tick present in the Bass option, my display looked like the below.

Is this the solution you're after or have I misunderstood your initial post?
Regards,
Noel