It takes me more time to come back to C1

More time is really 8-15sec. I have not reached focus 15 yet.

When I started I always came back to living consciousness almost instantly once the voice said so. Now I can literally feel very distinctively the separation between me and the body and I truly have to say in my mind 1 multiple times to merge awareness with the body and sometimes saying 1 does not help I feel like I can't move and not going to lie it's exciting but at the same time a bit scary when it takes me that long. (this happens when I go to focus 12 with the exercise especially patterning. Almost like I don't want to leave)

Should I prolong my meditations? has anyone experienced it? does it last?