For grub, the only limit I know is max 8 hdd's
5 OSs works fine here, but those have mostly just 2 options, just one has 4
Could be that 25 grub entries is too much, so maybe time to make some choices? :) Remove a distro and/or some kernel options?
Sorry for my bad english translation. They are 5 distros with a few optional entries (no 5 for each one), automatically generated! Anyway...I`ve installed other distro (was, finally, Mint; because Manjaro E18, my first election, broked the boot...), in replacement of Suse , and the new GRub has included the all 5! Horrible aesthetic, but functional boot. I must to learn the Grub detailed configuration (display backgrounds, entries options)
Thanks!