[BUG] Illegal Memory Access Issue with CAGRA Search with Pre-filtering

Describe the bug
I am running cuVS CAGRA filtered search with 5M vectors, 64 dim, fp16. Running a grid search and with a specific parameter set, filtering percentage, and batch size I get the below error-

Error in worker: cudaErrorIllegalAddress: an illegal memory access was encountered
CUDA call='cudaFreeAsync(ptr, stream)' at file=/__w/cuvs/cuvs/cpp/src/neighbors/detail/cagra/compute_distance.hpp line=259 failed with an illegal memory access was encountered
Error in worker: CUDA error encountered at: file=/pyenv/versions/3.13.3/lib/python3.13/site-packages/libraft/include/raft/core/interruptible.hpp line=303: call='query_result', Reason=cudaErrorIllegalAddress:an illegal memory access was encountered
Obtained 24 stack frames

Parameters - graph_degree: 64; intermediate_graph_degree: 64, itopk_size: 64, search_width: 8
Filtering percentage: 16%
Query Batch Size: 1000

When I don't filter, there is no illegal memory access issue.

Steps/Code to reproduce bug
Follow the steps here

Expected behavior

1. No illegal memory address issue.

Environment details (please complete the following information):

• AWS (g6e.8xlarge - 1 L40S, 32 vCPU, 256GB RAM)
• cuVS 25.06
• pip install

Additional Context
Attaching the compute-sanitizer log for illegal memory access issue with query_batch_size = 1000 for some parameter.

memcheck_illegal_access (1).log

The log is generated for the parameters: graph_degree: 64; intermediate_graph_degree: 64, itopk_size: 64, search_width: 8

Start with the compute-sanitizer log and cuVS CAGRA's cuvs/cpp/src/neighbors/detail/cagra/compute_distance.hpp at line 259. Reproduce using the linked steps with the listed graph, filtering, search-width, and query-batch parameters, comparing filtered and unfiltered search. Done means the filtered search completes without an illegal memory access.