I have hp-15-ac167nf with wireless chip rtl8723be and ubuntu xenial 16.04 LTS and HWE.
I got same issue: module rtl8723be option ant_sel=2 is not working anymore from kernel 4.15.0-33.
As a workaround I boot previous kernel 4.15.0-32 (from grub menu). On same PC, I tried ubuntu bionic 18.04, and symptoms are exactly the same.
I have hp-15-ac167nf with wireless chip rtl8723be and ubuntu xenial 16.04 LTS and HWE.
I got same issue: module rtl8723be option ant_sel=2 is not working anymore from kernel 4.15.0-33.
As a workaround I boot previous kernel 4.15.0-32 (from grub menu).
On same PC, I tried ubuntu bionic 18.04, and symptoms are exactly the same.