I had the same problem in a recent post. The solution was to place black-ticks around the link text. So the link you tried to post would be formatted as:

visual programming language .

instead of looking like

visual programming language

Note: At the time I posted this reply it seems as though the problem has been resolved. If there are underscores in the link text then the block-ticks might still need to be used. The above solution should also work if the bug pops up again.