Calc being accessed from both Windows and Linux via DropBox

I have a calc sheet created on Windows and stored in DropBox.
When I access it from a Linux laptop, I cannot paste into some cells. They are reported as protected.
The cells are not protected when accessed from my Windows laptop.

Is this a valid use of calc?

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Here is the OS and version information

Libre Office Versions

Version: 25.2.1.2 (X86_64) / LibreOffice Community

Build ID: d3abf4aee5fd705e4a92bba33a32f40bc4e56f49

CPU threads: 8; OS: Windows 11 X86_64 (10.0 build 26100); UI render: Skia/Raster; VCL: win

Locale: en-US (en_US); UI: en-US

Calc: threaded

Windows

OS Name Microsoft Windows 11 Home

Version 10.0.26100 Build 26100

Other OS Description Not Available

OS Manufacturer Microsoft Corporation


Version: 25.8.1.1 (X86_64) / LibreOffice Community

Build ID: 580(Build:1)

CPU threads: 8; OS: Linux 6.16; UI render: default; VCL: gtk3

Locale: en-US (en_US.UTF-8); UI: en-US

25.8.1-2

Calc: threaded.

Linux

OS: EndeavourOS

Kernel: 6.16.8-arch2-1

Note that I was able to paste into the cells today so this issue may have self corrected.