since omega install states already installed i would try to remove that .ipk and then install it thinking that it may be a bad install or the already installed message is wrong. it seems that something in the current install is broken so try to get rid of the install and try fresh install.

@Robert-Bouillon
Footnotes

Although the "current" word is known to MediaTek, many details are missing:

current consumption(s) GPIOs IOL, IOH absolute maximum / characteristic(s)

And an official Omega2/2+ schematic would be nice for an effective work.