Hello @kozeev,
I have to say this is expected. Frames don’t support the aspect ratio of the layers inside them when you make changes to the Frame. In this case, I’m afraid that you’ll have to rely on resizing the image manually.
This is a feature we’re aware of (we’ve seen it reported in this forum before) and I’m adding your case to our internal ticket, so our Product team is aware.
Thanks for reporting!