Just a minor issue, but when I look at this mod in-game (.18.22) the Changelog button is greyed out.

Other mods all seem to be working fine, including for example your own Teleporters mod, the Changelog button works fine for that one.

A quick look at the changelog.txt file, and the only difference I can see is that all the working mods (I checked about 8), all have a separator line (the -------------------------etc ) on the first line as well as between the Version sections.

But the changelog.txt for Transport Drones has this 1st line missing.

As a test, I extracted the mod zip file, manually added the extra line to the top of the changelog.txt, re-zipped the file, and launched Factorio. Changelog log button now works as expected :-D so looks like Factorio can't parse the file if it's missing this first line of dashes.

Obviously needs fixing at your end though :-)

PS: Awesome mod by the way, makes for an interesting change in play style, especially on my first Krastorio 2 playthrough!