[1.30] (and previous) BUG Build station module button not visible

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I've had this problem after the first time I started the game in 1.0 and build the first few modules. After that, the two buttons to build new modules or cancel the changes disappeared. I've tried building in a completely new plot as well. But to no avail.
With the release of patch 1.30 I started a new game but the problem still exists. See bottom right of the screenshot:

Edit: Just to make sure that none of the few mods im using is causing that problem, I disabled ALL mods, restarted the game and started a new game again and created a new plot immediately. No change!

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After stumbling upon this post: viewtopic.php?f=180&t=407093&p=4785295& ... i#p4785295
I can confirm that this is an UI scaling issue. Which is quite bad because I'm playing on my living room TV in 4k.