Feedback Out of date keywords in Materials would break SRP batch

Suppose such case:

1. There is a keyword `_ENABLE_SOME_FEATURE` in a shader;
2. Create two materials from this shader and toggle the keyword on one of the materials;
3. Remove the keyword from shader that would make the an out of date keyword remain in the previous material.
4. Attemp to render these two materials with SRP batch on;

After that in the frame debugger you would see these two materials were not able to SRP batch with a reason: materials have different keywords.

5. Open the material by a text editor locate the out of date keyword and remove it manually then render them again;

Now this time you could see them are successfully SRP batched.

Can the SRP batcher auto ignores the invalid keywords? For now I have to create a script myself to check hundreds of materials once a shader was changed to remove the invalid keywords.

 

However, in the frame debugger you could see the actual working keywords were same which means unity could determine that somehow I think.

 

That's cool.

 

I found that still breaks the SRPbatch in 2020.3.38f1.
Is there any solutions?
..or maybe a script that i can check all my materials?