Firstly. this is a user to user forum.
For official Adboe Support please visit https://helpx.adobe.com/support.html
There is a chat icon there and you will be able to get support through this.
This forum is mainly of users - like yourself - as it's a user to user forum.
Sometimes Adobe staff do visit the forum.
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I'm not sure what the issue is - but if it was a common issue the forum would be flooded with people of the same complaint.
My best guess is a font conflict of an installed font and having Adobe Fonts auto-activating in the background.
On a guess:
Go to InDesign Preferences
File Handling
And turn off Auto-Activate Fonts
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Sometimes there is a clue when it's hanging - the spinning Blue Circle in the Title Bar indicates something working in the background.
You can open the Window>Utilities>Background Tasks
To see what might be happening when working on your document.
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Common Fixes
1. Export your file to IDML - and open that in InDesign and resave as an indesign file
See if issue persists
2. Reset your indesign preferences
Delete InDesign preferences with shortcuts
You can delete the replaceable InDesign SaveData and InDesign Defaults files by holding down the following keys while InDesign is launching:
Windows: Shift+Ctrl+Alt
Mac OS: Shift+Control+Option+Command
Deeper clean options here
https://helpx.adobe.com/ca/indesign/kb/indesign-preferences-support-file-locations.html
3. Creative Cloud Cleaner Tool
https://helpx.adobe.com/creative-cloud/kb/cc-cleaner-tool-installation-problems.html
4. Rollback to a previous version of InDesign
https://helpx.adobe.com/download-install/using/install-previous-version.html