self hosted Bitwarden creating two similar .BAK files each night - one minute apart

[roblatour]

Steps To Reproduce

wait until Bitwarden's nightly backup happens then look at backup folder using MS explorer

Expected Result

Each night my selfhosted version of Bitwarden should only produce one .BAK file

Actual Result

Each night my selfhosted version of Bitwarden - running on docker under Windows docker for Desktop creates two similar backup files - a minute apart. I've done a hex compare on them and they are mostly, but not entirely, the same. A screen shot taken from the file listing window of MS explorer is included below.

Screenshots or Videos

Additional Context

No response

Build Version

Server Installed 2025.9.0 Server Latest 2025.9.0 Web Installed 2025.9.0 Web Latest 2025.9.0

Environment

Self-Hosted

Environment Details

W11 - Docker for Desktop

Issue Tracking Info

• I understand that work is tracked outside of Github. A PR will be linked to this issue should one be opened to address it, but Bitwarden doesn't use fields like "assigned", "milestone", or "project" to track progress.

[bitwarden-bot]

Thank you for reporting this issue! We've added this to our internal tracking system.
ID: PM-26138

[jtodddd]

Hi there,

This has been escalated for further investigation. If you have more information that can help us, please add it below.

Thanks!