Suggestions missing sometimes

[Vozf]

I have such mapping

map q <leader><leader>s

I have code like this, I'm on the first line and I want to the section coremltools

Then I press q and press letter c - everything fine

Then I press letter o and suddenly the suggestion on coremltools disappears and i can no longer to coremltools

It's hard to understand when and why exactly this happens, but it's reproducible so it's not a one time issue