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I was testing fishing in my game and getting pokémon to bite was getting difficult. I tried many times and nothing happened, so I tried altering fishing chances to 100% for my rod. Still nothing, as it just tells me they don't bite or to try again. I'll leave here links to my wild groups setup in case I'm missing something. Btw, I'm on the last version.
Here's my wild groups setup: Image on Google Drive