BUG of "Frame filter" in Setup tab of Forcite in MS 2020?

Hi everybody,

As we know, we can specify the frames to be included in the calculation of Forcite Mechanical Properties task. 

For example, I can create a trajectory document which contains 8 frames by AC module (see below figure 1) and I want to specify 6-8 frames to be included for Mechanical Properties calculation. I can type "6-END" in the "Frame filter" in Setup tab of Forcite (see below figure 2). And then I click the "Run". If this setting works, there will be only 3 frames to be included in the calculation.

This indeed works in the Materials Studio of versions 2019 and 8.0 (based on my testing results with MS 2019 and 8.0). However, it does not work for MS 2020. In fact, I found no matter what I typed in the "Frame filter" in Setup tab, all frames will be included in the calculation when I use MS 2020 (see below figure 3). 

I am not sure this is only an individual problem of mine, or it is a common BUG of software.

I hope someone can kindly test the "Frame filter" in Setup tab of Forcite in MS 2020 and feed back.

Thanks a lot !