u/Ambitious_Handle0629

I'm assessing a 4 years 11 months student with several common phonological processes but I have one pattern that I'm thinking a lot about and would love to hear if anyone else has seen this and has any advice.

She is producing /tr/ as /kr/, /dr/ as /gr/ so first I thought backing BUT she does not back /t/ and /d/ in any other positions/contexts, only in the r-blend. I started thinking maybe she's pronouncing them more like **“**ch" and "dge" but again she doesn't back those sounds in any other contexts, only when followed by the /r/. Is it the /r/ pulling her tongue towards the back of her mouth causing the backing?