Yes but development in bath A is very little, but indeed, it happens.

I developed two more rolls today and results were disappointing. I believe bath B is approaching end of life as negs are very underdeveloped. They were 7th and 8th roll.

So I guess bath B should be really used one shot. It is not so convenient after all.
Unless you just use Borax in B without Sulfite and move the whole Sulfite in A. Or just leave A with 50g/l to get a tighter grain (which I like better).

So my next attempt will be:

A:
Metol 3g
Sodium sulfite 50g
Water 1L

B:
Borax 5g
Water 1L

B to be used one shot.