Vertical typography mode view bugs

Hi! It seems that in vertical editing mode, I can’t center my view on glyphs that are positioned on the lower side. I can shift my view to anywhere when I’m zoomed out, but it doesn’t allow me to look at the lower glyphs when I’m trying to zoom in. Please see the screen recording:

Also, the glyphs viewer doesn’t work properly in the vertical editing mode. “Show all instances” does not show all instances even when the masters are compatible and instances are correctly set. If I ask it to show any individual instance, the viewer won’t center the current glyph selected so I can’t see the current glyph I’m drawing. These issues do not exist in the left-to-right typography mode.