When editing weight phone cursor shoots to the beginning of reps

I like the fluidity of the app, there is only one detail that gets me out of my flow.
When I want to edit the reps/weight manually*, let's say the reps are 10, and the weight is 8.75KG. I then press on the right side of 5 (from 8.75), the app's cursor then shoots to the start of my reps and ends up before the 1 (from 10). I then need to click again on the right side of 5, backspace until it's gone, and add 9.

Can you fix this bug/issue and just open the keyboard at the location that I tap? And while you are add it, can you maybe change from a normal keyboard with digits and letters to just digits, because we don't need the letters here, only the digits.

Hope you can fix this and thanks in advance!

* I could not use the + because the increment does not fit.

Phone: Samsung Galaxy S10 with the latest Android version.