Indesign DAILY CRASHED & now Corrupting FILES?!

I am having the same issue, at least once a day it appears to slow (to the point where I have to type and then wait for it to appear) and then shortly after it will crash and corrupt the file so that it can no longer open.

It is very worrying that this is now happening a lot

Which version of Mojave? Please use the number with the dot release — Apple has released several patches.

its the latest version - I updated again today in the hopes it would fix the problem - to be fair I didn't have a crash today but It was running incredibly slow, giving me the spinning beach ball after almost every action.

Have you tried the following troubleshooting steps?:

Trashing preferences on a Mac:

The User Library folder in which InDesign’s preferences are stored is hidden by default on most Macintoshes. To access it make sure that InDesign is closed and click on the desktop to launch a Finder Window (Command-N). With this window in column view follow the path User>Home folder (it’s the folder with an icon that looks like a house—it may have the user’s name rather than “Home”) and click on the Home folder. With the Option Key pressed choose Library from the Finder Go Menu. “Library” will now appear within the Home folder. Within the Library folder find the folder called Preferences and within it find the folder called “Adobe InDesign” and the file called “com.adobe.InDesign.plist” and delete both that folder and that file. When InDesign is next launched it will create new preference files and the program will be restored to its defaults.

The advantage of manually deleting preference files in this manner is that after you’ve reset up the program (make sure that no document window is open) to your liking, you can create copies of your personalized “mint” preference files (make sure that you quit the program before copying them—that finalizes your customization) and use them in the future to replace any corrupt versions you may need to delete.

Trashing Cache Files:

The User Library folder in which InDesign’s cache files are stored is hidden by default on most Macintoshes. To access it make sure that InDesign is closed and click on the desktop to launch a Finder Window (Command-N).With this window in column view follow the path User>Home folder (it’s the folder with an icon that looks like a house—it may have the user’s name rather than “Home”) and click on the Home folder. With the Option Key pressed choose Library from the Finder Go Menu. “Library” will now appear within the Home folder. Within the Library folder find the “Caches” folder. Within the Caches folder find and delete the entire folder “Adobe InDesign”. I find that deleting the InDesign cache folder completely leads to a lasting change. 

Uninstalling and Reinstalling:

In the app section of your Creative Cloud desktop app click on the “V” next to the app’s (InDesign) name and choose the “Uninstall” option from the pull-down menu that appears. After you’ve run the uninstall then use the Creative Cloud Cleaner Tool Use the Creative Cloud Cleaner Tool to solve installation problems  . Then reinstall the program through the Desktop app. Before you reinstall, once again trash all preference files to make sure that your install is completely clean. Then launch InDesign and see if the problem persists.

Also, if you are using any third party plug-ins (either with InDesign or on your system) try disabling them and see if that helps.

Finally, it is very possible that your problems are being caused by a problem on your computer itself rather than the software. I would suggest if all of the above fails then contact Adobe Customer Support Contact Customer Care . They can run a diagnostic on your system and help determine what may be going wrong better than can be done on the user to user forum.