help needed to blend two animations

hello, i’m trying to blend the last frame of an animation with the third person mannequin idle animation, so far i have tried many ways that o found on google and here at the forums without any success.

i have attached a video that shows my problem.

I just want to blend the last frame to avoid the weird movement after the end of the unequip animation.

some help or tip will be very useful.

thanks in advance for all the help.