enriched mode loses bold on save, version 26.1, debian 10.3

[Dan Hitt]

I can copy text that has colors and some words bolded into a buffer showing
an enriched-text file.

For example, i can open an eshell, and do ls: the command prompt is bold
and orange, while the files i list that are directories come out bold and
blue, with black unbold text for regular files.

When i paste this text into an enriched-text file, all of the colors and
bolding show up.

When i close the file, and reopen it, the colors are still there, but the
bolding is gone.

This is in emacs version 26.1, on debian 10.3.

What i would like is for the bolding to be saved as well  --- if
enriched-text is not suitable for this, is there another mode anybody can
recommend?

TIA for any advice or info.

dan