Houdini 22 HtoA 6.5.3.2 - Arnold chokes hard on initialization & keeps reinitializing

**Describe the bug**
Not much more than the title needed.

How to replicate.
20 cams, 10 lightlinks, 5 meshes, native usd mtlx subnet w/ opbr.

Every single slightest cam tweak falls into the constant never ending reinitialization cycle instead of init -> render. Requires restarting the render to get out of the never ending reinit cycle.

Impossible to work with. Every slightest camera pos tweak etc falls into it.

Reproduce the issue in Houdini 22 with HtoA 6.5.3.2 using 20 cameras, 10 lightlinks, 5 meshes, and the native USD MaterialX subnet with opbr. Test repeated camera position tweaks and verify that initialization completes into rendering without an endless reinitialization cycle or requiring a render restart.

Written by the indexing model from the issue text.