Buttons removed after save, not available after 'repair'

Hi all - I've been having an intermittent problem that I've not been able to successfully troubleshoot on my own - hopefully you'll have some insight.

I have a workbook with 4 tabs, 2 dozen subs in 5 modules, connectivity to SQL, and 8 forms.

On the primary sheet, I have a series of buttons that kick off various macros or show various forms. I had originally used active x buttons, but those were resizing/moving and the font was changing on them, so I switched to the FORM buttons.

Now, periodically and unpredictably, when I open the workbook, I get an error saying that the file was damaged or corrupted. I allow Excel to recover what it can, and everything is fine - except that the buttons are gone, so I have to create new ones.

I've saved the file as a new file, run the Office repair process, and had Excel reinstalled. I haven't had this problem in any other workbooks, but am not actively working on any that are this involved at the moment.

Any ideas what's going wrong? Should I be using the Active X buttons and dealing with the resizing weirdness?

Thank you for any guidance

Honestly, I checked the logs but couldn't make sense of them - I'm running the repair again now and if I can replicate the problem I will post them here.

Thank you for your thoughts on the buttons. I'm never sure which to use!

Okay it happened again. I get a pop up providing the 'Repaired Part' (Repaired Part: /xl/worksheets/sheet1.xml part. ) with a link to the log file. The log file just has this the file path and that same repaired part.

There has been no solution found - not have I been able to isolate the actual point of corruption. However, after replacing the form buttons with activex buttons, I have not had the issue again.