Repeatable in multiple ubisoft titles; Ubisoft Client repeated crashes when changing game resolution to/from 6880x2880 and gives some sort of C++ error. This does not occur with GoG, Matrix, Slitherine, Origin, or Steam titles; only Ubisoft.
Specs: i7 10920X@stock (up to 4.6/4.8Ghz)/32GB DDR 4 XMP@3200Mhz/RTX 3080Ti 12GB; occurs with multiple Nvidia drivers.
Doesn't matter if I'm using Medium or Ultra settings; I get consistent sutttering; tried on two PCs including i7 7800X on PCIE SSD with 32GB RAM and 1080Ti as well as i5 9400 with 8GB RAMl and 1070Ti. Disabling overlay and using offline mode did not help. I can't believe how bad the performance is; never bought a game that played this bad since Daykatana.