Material layers parameter animation

Can´t animate Material layer parameters…

I went back to Unreal4, just to make sure its not an UE5 issue, but its just the same.

So,
What I figured out now…

I can´t add any parameters to animate in the sequencer.

BUT.

If i replace the parameter value with a material parameter collection, I can then add this MPC to the sequencer and animate that, and that works.

But of course, that workflow is quite awkward. 1. I gotta go through every material, figure out which parameters might have to get animated and replace each and everyone with a material parameter collection. 2. I have to create a unique MPC for each parameter. Because otherwise, if I animate one, that is also used in another material, ALL instances of that parameter would get animated.

So, I just wanna ask one more time:

Is it a known restriction of material layers, that you can´t animate any of the parameters? It seems so incredibly dumb, that the best material layering system in Unreal should be that impaired, that i cannot be used to animate material parameters.

If I don´t get an answer, I´ll have to rebuild all my projects master materials as standard materials with a couple of blend options…