Might the fact that you are using Jackett's All indexer (api/v2.0/indexers/all/results/torznab
A special "all" indexer is available at /api/v2.0/indexers/all/results/torznab. It will query all configured indexers and return the combined results.
If your client supports multiple feeds it's recommended to add each indexer directly instead of using the all indexer. Using the all indexer has no advantages (besides reduced management overhead), only disadvantages:
you lose control over indexer specific settings (categories, search modes, etc.)
mixing search modes (IMDB, query, etc.) might cause low-quality results
indexer specific categories (>= 100000) can't be used.
slow indexers will slow down the overall result
total results are limited to 1000
I've setup all my indexers separately and I have not experienced any problems with Jackett, either with TV Rename or Qbittorrent.