Better workflow Object Matte on 25fps interlaced materialy

When adding an Object Matte to 25fps interlaced, AE requires to switch the Comp to 50 fps. Although imho this processing should happen under the hood, I can understand why that is needed. But the thing is, when doing so, the timing is changed: the Comp length is doubled in time. I think time should remain the same.

Is this new behavior? I remember that changing frame rate in Comp settings did not affect Duration in seconds.

Please repair, or give the option in the Comp settings to maintain time or frames.

(Materialy is a typo in the heading - can’t edit it)