MSO Files being randomly renamed while open on desktop

Not sure if anyone is facing this issue - but I have been facing this for 2 months now and it is really really frustating..!

While working on Excel, Word or Powerpoint - a lot of times (very frequent now) the filename of the open file (on which we are working) suddenly gets saved as a random number (e.g. 12456.xlsx). If we aren't alert - if you close this file - "You lose the original file from the original location". Gone - absolutely disappears.

I tried to do some research on the issue and found -

1. Closing Excel App and reopening will give you the randomly named file in 'recent' list - however you can't open it.
2. Checked the hidden folders and found same name file in '.temp.upload' folder, but without any .extension
3. Renamed this file to .xslx and I got all my data back. However - if you do not rcover your file on same day there is a chance that you lose this file forever.
4. I understand now by some online surfing that this is a Onedrive Sync issue. However, my broadband is super - checked the data throughput for the instance and it was continuous highspeed without any drops.

This has become so frustrating now that I am thinking of moving out of MSO. It is very stressful and distracting now to be continuously alert and check the filename every few seconds.

Does anyone else face this issue? Are there any solutions for this problem?