why is awk printing only first word in a field?

I have a tabulated .txt file with three fields, the third field often having multiple words:

GO:0000002  Akt3    mitochondrial genome maintenance
GO:0000002  Mef2a   mitochondrial genome maintenance
GO:0000002  Mgme1   mitochondrial genome maintenance
GO:0000002  Mpv17   mitochondrial genome maintenance
GO:0000002  Mrpl15  mitochondrial genome maintenance

I wanted to swap fields 1 and 2 using awk, but when i run the command:

awk 'BEGIN{OFS="\t"}{print $2,$1,$3;}' file.txt

I get:

Akt3    GO:0000002  mitochondrial
Mef2a   GO:0000002  mitochondrial
Mgme1   GO:0000002  mitochondrial
Mpv17   GO:0000002  mitochondrial

Why do i not get all the words in the third field, and how to solve this?

Thanks in advance

>Solution :

There are various ways to solve the problem, but the main issue is that the output field separator has been set, but the default input field separator is both tabs & space. Setting them both to tab should give the output you want (or make it more generalizable by just swapping the first two fields & printing the remainder of the line)

awk 'BEGIN{OFS="\t"; FS="\t";} {print $2,$1,$3;}' file.txt