SUMPRODUCT with cross-sheet references: @ operator auto-inserted, causes #VALUE!

[kritikostony]

Version: Document Server v9.3.1 (App v1.2.8)
OS: Self-hosted (Docker/Nextcloud)

Steps to reproduce:

1. Open an .xlsx file exported from Google Sheets
2. Enter the following formula in any cell:
   =SUMPRODUCT((Salary!$A$2:$A$3))
3. Press Enter

Expected result:
Formula evaluates correctly and returns a numeric value.

Actual result:
OnlyOffice automatically rewrites the formula to:
=SUMPRODUCT((@salary!$A$2:$A$3))
This causes #VALUE! error. Removing @ manually has no effect — it is reinserted on confirm.

Additional notes:

• Simple cross-sheet references like =Salary!A1 work correctly
• The issue is specific to cross-sheet ranges inside SUMPRODUCT
• File originated as Google Sheets exported to .xlsx (Excel 2007 format)
• SUMIFS with cross-sheet references appears unaffected

[Rita-Bubnova]

Hello, @kritikostony.
Thank you for your report! This is a known bug, issue #80525.

[Rita-Bubnova]

This has been fixed (ONLYOFFICE/sdkjs@5ec66e2) and will be released in the next release.

[kritikostony]

Thank you for informing me! I was trying to find if anyone had the same issue but didn't manage to find the issue you're referencing so i opened a new one. I'm glad you guys fixed it and I'm looking forward to the next release!
Thanks again and keep up the good work! 😃

[kritikostony]

So two releases have gone by and the problem persists.