Icewind Dale 2 Wine performance

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Hello, and thanks for your work here. I am on Ubuntu 22.04, Icewind Dale 2 EE mod, wine 10.10 (Staging). cnc-ddraw 7.1, default settings (ddraw.ini). When I move the in-game characters one by one they are moving smoothly, but when I move all 6 of them together they get a bit laggy/stuttering. Is there anything I could try, settings-wise, or in other way? I have tried various ddraw.ini settings combinations, with and without CSMT, but it persists. A guess is this happens when things get a bit more cpu-heavy (multiple player character pathing, many enemies on screen, etc). Any suggestions? Thanks in advance.

EDIT: Tried a fresh install, base game (no EE mod), with the widescreen mod. There is no problem there, the game runs normally.