[Bug Regression 5.3.7p4] Alpha Clip Shader failed on Andreno 405 device. AGAIN!

We're currently developing on unity 5.3.7p4. And recently we find the 'clip' instruction failed on VIVO X6A whose GPU is Adreno 405. I tried to rewrite the clip() part in several ways (using discard directly, changing the variables' precision), to try by-passing this issue but failed at last.

Then I start searching and found this:

• (808817, 805086, 801150) - Android: Fixed clip() in ES3 shaders on some Adreno GPUs.

The very first fix log in 5.3.5p8 which released nearly a year ahead of 5.3.7p4!
All the issues are marked solved.
So I post it here to let u guy know : IT'S STILL NOT FIXED!