You're forgetting what people do if deflation is expected to continue indefinitely, and can also expect for their notes to be written off: They stick that extra money under the mattress.

This is basically what a bunch of people did during and following the Great Depression. Deflation was continuing and the money they had lent to the banks was being written off in bank defaults. And so an entire generation learned to just stick it under the mattress (or stick it in T bills, which reliably didn't default).

Also, it's not just a literal increase of money that causes inflation, an increase in money velocity also increases inflation. Debt write-offs decrease velocity, while debt issuance increases velocity. IANAE.