I'm not sure if this is actually a bug or if this feature just hasn't been fully implemented yet, that's why I'm asking.
0.17 introduced a new feature that allows for multiple versions of the same mod to be installed simultaneously, which fixes many incompatibility issues with servers.
All of the installed versions can be seen in the "Active version" drop down like shown here:
However the problem is it appears the selection in this drop down is not being saved anywhere. After every restart of Factory or just when manually selecting a version, then leaving and reentering the mod list, the selection is reset to the latest version.
I wondered then why the drop down even exists if it doesn't do anything. My conclusion is this is either a bug or missing functionality.
[0.17.6] Mod active version non-functional
Re: [0.17.6] Mod active version non-functional
Thanks for the report. It was broken and it's now fixed for the next version of 0.17.
If you want to get ahold of me I'm almost always on Discord.