Speech impediment with HA's

When I had CIC’s (Oticon Adapto) I developed a lisp. It was like my tongue forgot how to work. It got better as I got used to the HA. I asked my Audi about this and he just blinked and chuckled a little. He didn’t know what was going on.
I decided to try BTE’s (Oticon Epoq) and have no speech problems.
Anyone else come across this or am I weird?