If the line of the prompt contains some additional text except the text of the prompt itself, when resizing the FluidShell window/tab, parts of the additional text remain on screen, they disappear only once a letter key is pressed. This behavior doesn't occur neither in Bash, nor in SSH Terminal.

Example:
prompt$ echo -n this is just an example of echoed text
this is just an example of echoed textprompt$

After resize becomes:
prompt$ just an example of echoed text

See also attached screenshot (fs-echo-n-prompt-txt-after-resize.png).