Applied cut string does not work as expected

[Wile_E_Coyote]

I think I spotted the problem.
You define “nMuon” and “nElectron” as “UInt_t” but you use them as variable size arrays’ lengths. I think this is not supported in ROOT (@pcanal even in the newest 6.26?). You must use “Int_t” variables for this purpose.
There are more such “UInt_t” variables which need to be “fixed” (e.g., “nboostedTau”, “nCorrT1METJet” and so on).

Inf/NaN propagated to the pad. Check drawn objects

You use “UInt_t” variables to keep the variable sizes of some arrays. @pcanal There is / was a requirement that leaves keeping such sizes must be “Int_t” (i.e., “32 bit signed integers”). However, it is also possible that accessing such trees via a TTreeReader based interface would be free from this “limitation” (but see also this old post).