Joomla + Virtuemart + T3. Why does the VM content disappear from the main page when the second sidebar is enabled?

Question

Joomla

Good afternoon! I am suffering with this problem.
There is an online store Joomla 3.4.1 + Virtuemart 3.0.8, made on the t3_bs3_blank theme within the T3 framework ( samogonkupit.ru/). Need to move some modules from sidebar-1 to sidebar-2 (like Widgetkit), i.e. from the left column to the right. Initially, sidebar-2 contained nothing.
And if any module from sidebar-1 is placed in the sidebar-2 column, then the display on the main page of all modules of the Virtuemart type that show a brief extract from the catalog (for example, "Sale") stops. No matter what position you specify in the admin panel, even if you try to put it in the footer for the test, they will not be displayed anywhere. Internal pages work fine.
I've been fighting for several days now, I can't figure out where the dog is buried? The "Display on specified pages" binding and other settings for VM-type modules are not affected in any way when you transfer completely different modules from sidebar-1 to sidebar-2. The internal settings of the T3 framework from the admin panel seem to have nothing to do with it either.