Hi, i have this issue where the grass never stops growing even if i have built right next or even upon the stem. My base is basically a forest at this point. 
It does have a little charm but it feels very glitchy and unpractical, does anyone have the same issue ?

I do as well. Only have a small starter base(dont really plan on going big until more options are available) but I have 2 grass blades that grow right through the foundation. I did originally cut them down all the way before building there.

I saw this happen to me when the update was released. I had everything cut down in my little corner of the park, the update dropped and all of the grass grew back. Chopping it back down proper fixed it fine for me though and I haven’t had any more grassy invaders since.