Nuendo track-export issue

Hello all,
I am facing the issue, that one track in a track export cannot be exported caused to a cross-fade.

Just one cross-fade trigger a bug that i cannot export the tracks out of my session. After i edit both events to fade-in/out i had no problems on exporting tracks. Where does this issue/bug come from?

I edited the session in Nuendo 12.0.30 first and tried to export it out of N12 and N11. Both versions had this issue.
My computerspecs are:

Intel i7-11700k
Gigabyte Aorus z590 Master
Gigabyte RTX 3080 Gaming OC
32gb Memory
full custom loop watercooling
Gigabyte GC-Maple-Ridge Thunderbolt add-in card
sonnet thunderbolt PCIe extention case
Focusrite Saffire Pro 40 firewire
Samsung SSD 980 Pro 1TB
WD Black SN750 SE 1TB
Windows 11 Pro
drivers up to date

Anybody has knowledge about this issue maybe?