Studio Log sometimes blank after submit

[JonathanWill]

Occasionally (less than 1 time in 100), when I submit code in SAS/Studio it executes, but no log is displayed.  Depending on what the code was, output and generated datasets are displayed as normal, but the log is completely blank.

I've recently found that when this occurs I can go to the submission history and view the previous submission and in there the log displays correctly.  So the log is being captured, it's just not being displayed in the 'live' program window.

Has anyone else experienced this?  

This is on Studio 3.8 (Enterprise Edition) with SAS 9.4M6 

[XingZ]

Maybe there is a variable assigned with a truncated value. Try to specify length for any character variables.