How to use uidm in octane

[blackcat321]

I use the image titles node to use udim, but I have some problems. When my UV mesh is not placed in order, I can't use udim. For example, as shown in the screenshot, I can't read the specific map of udim

Besides, octane is really easy to crash

[aoktar]

We can check if you provide scene with assets and bugreport.zip, also detailed info about version/os/he and how you make it crashed