Studio crash: The number is added to target file in project folder

Hi,

we experience from time to time weird issue. After Studio unexpectedly crashes 6 digit number is added to target sdlxliff file name in projects folder. 

Here are symptoms we can tell so far

- it only started after we upgraded to 2017

- The file name in Studio does not change.
- So far, it has affected .xlf and .docx file types.
- It does not affect all files in the project.
- We do not know when the issue happens.

As a result:

- the file cannot be opened for processing in Studio.
- the file cannot be saved.
- The message "The file at location xxx does not exist!" is displayed.

We are using Studio Client 2017 CU7. GroupShare is 2015 

thanks and regards,

Fana