I don't think it is a glitch or something, but I want to confirm it.
I downloaded some techs from the workshop. Some techs have a proper name, others have "My tech", "Player tech #2" or translations of "My first tech". I wonder there are glitches while downloading so I unsubbed and subbed multiple times, but their names are always the same. So it looks like there is no problem in downloading.
Then I made the tech in creative mode and uploaded it to a workshop, in various ways.

First, I click 'snapshot' button, then click 'Upload to steam' without changing the name of tech. Then I named it in the second window. When I sub and load it, its name is shown as "Player tech 5"(of course a Korean translation of it, because I used the Korean version
)

Next, I name it "Smashbot" and save it on my computer. Then click 'snapshot' again and upload to steam. When I download it, it is shown properly.

Finally, I load my "Player tech 5" tech again and renamed it 'Smashbot II'. Then I upload it to the workshop with another name. When I download it, its name is 'Smashbot II'.
In my opinion, there is no problem. I think when you upload to steam, it just uploads the snapshotted png file. If your snapshot has no problem, there will be no problem in the workshop either.
Maybe I couldn't experience weird things because I subbed what I uploaded to the workshop. If anyone downloads my files and checks them, it can really help.
https://steamcommunity.com/sharedfiles/filedetails/?id=2320250514 : It should be the korean version of "Player tech 5"
https://steamcommunity.com/sharedfiles/filedetails/?id=2320250878 : It should be "Smashbot"
https://steamcommunity.com/sharedfiles/filedetails/?id=2320278024 : It should be "Smashbot II"
I downloaded some techs from the workshop. Some techs have a proper name, others have "My tech", "Player tech #2" or translations of "My first tech". I wonder there are glitches while downloading so I unsubbed and subbed multiple times, but their names are always the same. So it looks like there is no problem in downloading.
Then I made the tech in creative mode and uploaded it to a workshop, in various ways.


First, I click 'snapshot' button, then click 'Upload to steam' without changing the name of tech. Then I named it in the second window. When I sub and load it, its name is shown as "Player tech 5"(of course a Korean translation of it, because I used the Korean version

Next, I name it "Smashbot" and save it on my computer. Then click 'snapshot' again and upload to steam. When I download it, it is shown properly.

Finally, I load my "Player tech 5" tech again and renamed it 'Smashbot II'. Then I upload it to the workshop with another name. When I download it, its name is 'Smashbot II'.
In my opinion, there is no problem. I think when you upload to steam, it just uploads the snapshotted png file. If your snapshot has no problem, there will be no problem in the workshop either.
Maybe I couldn't experience weird things because I subbed what I uploaded to the workshop. If anyone downloads my files and checks them, it can really help.
https://steamcommunity.com/sharedfiles/filedetails/?id=2320250514 : It should be the korean version of "Player tech 5"
https://steamcommunity.com/sharedfiles/filedetails/?id=2320250878 : It should be "Smashbot"
https://steamcommunity.com/sharedfiles/filedetails/?id=2320278024 : It should be "Smashbot II"