F1 2013 Gear problem

[loma28]

Hi, I started a new season with new profile ,I run first three races and in every one near the end of the race I loose one gear, i.e. 4° gear so that I jump from 3° to 5°.
I did install some mods ( True to life AI, Mistakes and bed Luck) like in previous seasons, but I never had that issue.
Any idea about reason and how to resolve this lack? Thank-you