Apple - Mouse cursor disappeared on external display when rotated

I actually just solved that problem on my Macbook Pro.

Tried all possible solutions. What worked was to make the cursor bigger. However, depending on your screen resolution you will need to play with different sizes.

There is a discussion in Apple forums with more details: https://discussions.apple.com/thread/8342495

Installed 10.13.5 release today, and it's fixed!

I installed the macOS 10.13.6 beta today, and it appears to have fixed the issue. If it recurs later today I’ll update this answer.