Comment 64 for bug 1396379

I just came across this bug after being forced to reinstall my main OS - I got my grub altered despite making no mistake when installing parallel ubuntu on different device.
I was using 20.04 LTS and I am extremely disappointed with the reason: old bug that made installer not trusted. Fortunately it was my private computer and I was able to make backup of all files so the restoration won't take more than hours.
For me this should not only be *critical* but fixed and backported into all supported editions, LTS including. It's very dangerous and time/money consuming error.