TKSS TYPE VIIC takes too long for watch crew to get on bridge

… I have tried every trick I can think of to get my TKSS18 Type VIIC to have the watch crew on the deck when surfacing in the same time as GWX VIIC’s or even the TKSS18 type VIIB. It takes a little more than twice as long as any other boat. The same goes for the VIIC/41. I think this is not acceptable.
I just want to know if anyone else has this issue and if there is a fix, Thanks.

AI Bot running SUBSIM, what could go wrong?!