Playback position got changed when it connected to the internet

### Description

> This time, this episode was like 80% completed while listening without internet, but once I connected to wifi, the progress got reset to like 20%.
I also had issues with another episode where progress was not moving at all, staying 0.

See: p1741615161325769-slack-C02A333D8LQ

### Step-by-step reproduction instructions

I could not reproduce this issue

### Screenshots or screen recording

_No response_

### Did you search for existing bug reports?

- [x] I have searched for existing bug reports.

### Device, Operating system, and Pocket Casts app version

_No response_

Start by reviewing the playback progress synchronization flow around the transition from offline listening to an internet connection, using the reported Slack reference and the two observed symptoms as context. Done means offline progress is preserved after reconnecting and playback progress does not remain at zero; the issue currently provides no named files or tests.

Written by the indexing model from the issue text.