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Modern UI File Upload Freezing – Classic UI Workaround and Client Experience Concern

  • March 13, 2026
  • 1 reply
  • 27 views

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We noticed that in some situations while working in Modern UI, uploading files (for example receipts/attachments) can take a long time and sometimes the screen may freeze during the process.

A suggested workaround in such cases, as recommended by the Acumatica support team, is to switch the screen to Classic UI, where the file upload process works smoothly without freezing.

However, most implementations today recommend Modern UI for clients, and asking users to switch between Modern UI and Classic UI for certain screens every time they perform an action may not be very convenient. From the client’s perspective, repeatedly changing the UI can feel uncomfortable and disrupt the user experience.

I wanted to understand from the community:

  • Have others experienced similar behavior in Modern UI while uploading attachments/receipts?

  • Are there any other recommended solutions or best practices to handle this situation?

Any insights or experiences would be greatly appreciated.

1 reply

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  • Varsity I
  • March 25, 2026

We have experienced many issues with the modern UI. We have had to permantly revert many projects screen and the ppoinemnt screen back to the classic UI because they are extemely slow or they won;t load.  This was the work around from support.  We just upgraded to the modern UI and we are still finding lots of bugs or having to do customizations or use the classic UI.