Charles is spot on.
Much networking kit is shipped with 'older' firmware.
With relatively new technologies such as WiFi, there are bound to be bugs. Manufacturers often release new firmware on a regular basis, often with fairly extensive release notes.
You just have to go and hunt it out. Worth a read of the release notes beforehand to establish if it is likely to assist with your particular issue.
Sometimes by moving forward to a newer version of firmware one can actually introduce new problems/features. So I emphasise the reading of release notes.