fix loading model with kwargs

[Borda]

What does this PR do?

Fix loading from checkpoint...

Fixes # (issue)

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[williamFalcon]

nice!

[nischal-sanil]

Does this pr solve these issues #2386 #2359 #2364 ?

[Borda]

@nischal-sanil even they are similar, but I guess it is not fix... Mind try the master and eventually share minimal examples to reproduce? :)

[nischal-sanil]

@Borda Sorry I had forgotten to add the steps to reproduce the error. I have updated my current issue #2386 to contain the same.