Is uboot updated when flashing the newest stable firmware?

I read that there is a bug in uboot and it should be updated.
Is uboot updated when I flash a new firmware, e.g. the newest stable version 4 for Flint?

No Uboot needs to be updated manually before going from firmware 3.x to 4.x. If you upgrade firmware and not Uboot it can cause issues down the line. Third post from Hansome

:gl_emoji_dizzy:I do not work for and I am not directly associated with GL.iNet :gl_emoji_shacking:

How to check uboot version and where to get the latest list of uboot firmware?

The uboot version is displayed on uboot itself.

So when you enter uboot failsafe mode, the version will be displayed there.

Check out this post about Flint uboot