Graphics Analyzer Get Zero Fragments on Part of Drawcalls

Hi guys,

     I am debugging a basic Unity URP Demo with Graphic Analyzer（5.11.1.1966b596）. The shader/fragment metrics show zero fragments on SSAO drawcalls.Is this a bug? (The red box part in the figure 1)

     The data is captured on Samsung SM-A730F with GPU Mali-G71.

Another problem with GA fragment data is that the number of fragments that can get data is three times the actual number。

Here is the test case, I try to draw 7 quad on the screen from large to small( like the case in the figure 2 ), 

each quad size is listed in figure 3, 

the fragments counted by GA is in the figure below, it's 3 times the actual number