When non active messages window updated - it becomes blank (invisible letters)

[sandric]

If I open messages buffer in split window and evaluate some code that prints message in elisp buffer which is currently active other window - messages buffer window becomes blank (foreground of letters becomes fully transparent and letters invisible).

[robario]

Here is another solution.
https://emacs.stackexchange.com/questions/24630/is-there-a-way-to-change-color-of-active-windows-fringe#answer-36240
Hope this helps.