How to prevent cycling shorts damage from brooks swallow saddle? I am new to cycling and I have brooks swallow saddle and pair of cycling shorts. After the ride, I observed that the short's fabric is a bit damaged. This happened at the same place for both shorts. I don't know what exactly is causing this to happen. Can someone please suggest me on how to prevent this?
I also applied saddle cream after buying the saddle. This happened immediately after the first ride with both shorts.
please find image details here -
Castelli - 
Gambitt - 
saddle image - 
EDIT- short full photo - https://imgur.com/C2eDcOX
EDIT - possible reason - https://imgur.com/QFWPNPB
I finally found the root cause after confirming the issue with the bicycle store. Also, I thank, @Andrew Henle for helping me out in finding the issue.
There are two reasons for my shorts being damaged with this brooks saddle.

My left leg is seaming inwards (arch is dropping inwards) while pedalling which is the reason, my left thigh is constantly touching the saddle front part.
My brooks saddle has a slight bulge towards the left side at front of the saddle, which has to be straight. And the friction due to this rubbing on leather is a catalyst in this damage.

The bicycle expert in-store suggested me to go for a non-leather saddle for now.