Hi,
I just want to clarify some things...

1) I've always got good result with my philly. So I would say my stropping technique is not the problem.
2) I didn't apply to much diamond spray on my felt, only a fine layer, no bubble at all. I don't think this is the problem.
3) I put less pressure as I can when I strop, I always try to put no more than the weight of the blade on the strop.
4) Yesterday night I did exactly the same steps I usually did after honing -> hone and Strop. The difference now is that instead of using the philly (which is now pasted) I use the bridle. I can't get the edge as sharper than what I got with the philly.

Conclusion:
Based on that, I can exclude Diamond spray and my stropping technique being a factor. My stropping technique is the same since at least one year now.

So now, is my new Bridle need to be more broken??

One more thing about the HHT, for me this test DOES work. When the hair pop easily, then I can tell you that my shave will be very smooth. When the hair doesn't pop, I know I'll get hard shave. It may not works for everybody, but I don't really understand how the HHT with always the same hair cannot be a sign of how sharp the razor is.

Thanks everybody to support me! :-)