1st, if you’re running a business/pro-users -You - need to develop a system that works for you irrelevant of what the developer says, does, work, or what is their fault and not their fault. From OS, to OS version, to screen monitor type, to graphics card. - You - have to engineer a system that works for you and the software.
2nd, once you have that and you’ve stabilized your life - you need to be - very - very - extremely - cautious about when, what, how and why you upgrade or change anything with your set up.
I am still running Cubase 10.0.6 on Windows 7 for this very reason, and because of that, I have - zero - problems.
You need to be responsible to a degree, actually a fairly high degree, to - fix - your - problems - without Steinbergs help. That is the truth many people in this forum seem to have trouble with. I’m not blaming you, I’m just giving you the reality of the world.
Having problems with a 4k screens and Cubase? Sell it, and buy a 1080p screen. Seriously. You do 4k video editing to? Well you might need two screens then.
This is reality. With all Software, especially older software. and pretty much everything in life.
It took Boeing 3 to 5 planes full of people crashing before they figured out a simple problem, or that there was even a problem beyond human pilot error.
If you buy a specialty coffee roaster from Italy, well, if that roaster breaks… Don’t expect parts and service the next day… in fact, you might have to fly someone in from Italy to fix it…
Now in terms of your particular situation. First of all, you’re posting in ‘General’ instead of ‘Issues’.
Please do try and create a new ticket with your video, and make sure you also check your emails trash, and if gmail, All Mail. Gmail is notorious for putting legit mail in the wrong place. you have to check your ‘All Mail’.
You can also submit questions to Greg Ondo for his Google Hangouts stream sessions clubcubase at steinberg.de
Sometimes, you have to engineer your system to work with the software because the software company has an endless amount of end-user variables to code for between two different OS’, one of which is a dictatorial authoritarian cult OS (apple).