I upgraded to the most recent version (18.104.22.168) and saw a problem I have never seen before. Let's see if we can get some duplication here.
1. Extract two files from the attached archive.
2. Open both files.
3. Copy the object in ESW-105-12-G-D.TCW
4. Paste it into Charging Bay 4.TCW.
In my tests, the resulting object is way too large (inches instead of mm because dividing by 25.4 gives it the correct length and width), but way too flat (as in a 2D object).
I was able to get around the problem by saving ESW-105-12-G-D.TCW as a version 21 file, then opening, copying and pasting it into Charging Bay 4.TCW, which is how I came to suspect that the latest update is the cause.
What results do you get?
TC Pro Platinum 2020, 2019, 2018, 2017, 2016 & 2015 (all with LightWorks & RedSDK) & V21
System: i7-5820K @ 3.30GHz, ASRock X99 Extreme4, 16GB DDR4-2133 RAM, Gigabyte GTX 970, Samsung NVMe SSD 950 (256GB), Windows 7 Pro (64-bit) SP1