Just noticed with the class 33 and 47 (probably the 09 as well, not tried) the buffers of the loco and first carriage do not meet properly they go through each other. Easily spotted using a external view when carriages uncoupled and pulling away. Still enjoying TSW despite many little bugs.
Submitted a ticket to Dovetail and had a reply ( see below) Thank you for supplying the attached images. I've reported the issue to the Dev Team ensuring to include a list of your settings so they can hopefully resolve the cause in a future update. Kind Regards, Daniel Dovetail Games Customer Support