InDesign 2024 - copie de boîte texte avec couleur

The only thing I can think of is there are 2 tools in the tool panel to select items.

You have a Selection tool (the one on the left) and direct select tool (the one on the right)

When you select with the direct select tool you are only selecting the objects frame and not it's contents - so to speak.

If you select with the other tool (the one on the left) - you select the frame and all it's content.

If that's not it - then something is wrong

If it's just this file
If a document is not behaving well then try 

File>Export 

Choose IDML

Open the IDML in InDesign
Save the file as a new InDesign file with a new name
See if the issue persists.

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If it's every file

Try resetting your preferences:

Windows: Start InDesign, and then press Shift+Ctrl+Alt. Click Yes when asked if you want to delete preference files.
macOS: While pressing Shift+Option+Command+Control, start InDesign. Click Yes when asked if you want to delete preference files.
A dialog will appear asking to delete the InDesign Preferences, select 'Yes' on this dialog.
Further info and instructions here if needed:
https://helpx.adobe.com/in/indesign/kb/indesign-preferences-support-file-locations.html

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if that doesn't work

Reinstalling rarely fixes everything - you can do a complete reinstall using the
Creative Cloud Cleaner Tool https://helpx.adobe.com/creative-cloud/kb/cc-cleaner-tool-installation-problems.html