On Dell e5420 bios machine and legacy partitioning i had Antergos xfce/lxqt on the first primary partition, plus other linux OSs on 2nd and 3rd primary partitions, plus a 4th extended partition with swap and a couple logical partitions. When trying to install another Antergos in a logical partition OR into primary 2 or 3 the “Installing Bootloader” near the end lasts forever, then installs man pages and finishes with the error that bootloader may not be installed correctly. I restart and nothing will boot. Finally i put it over my original Antergos partition and it installs fine, also picking up the one remaining os. Why is this?