Not on character selection, but I'm crashing immediately after using any mount skill. No exceptions, instant crash on any mount, also cuts my fps by ~20%. No issues after removing arcdps. Using wine-staging-6.17, dxvk-1.10.1-async, d3dcompiler_47 fix and dx11.
Interesting bit about performance regression, for me it's staging-6.17, anything newer sometimes tanks my fps to unplayable levels. I'll have to try proton-ge version you are using, maybe I'm missing out.
edit: New arcdps update (june.29), "fixed a possible crash" in changelog, all issues I had with previous versions (june.28 may.25) are gone.