currency calculation

I have an issue with currency fields:
the amount entered in a field set to currency, rounding 2 (or 0, no difference) is multiplied by 10 (or sometimes 100).

in example:
quantity set to 3, I input price 1$ and the result is Price: 10$ , Total: 30$
console outputs this debug information: formula: 1000 * 3

quantity set to 3, I input price 12$ and the result is Price: 1200$ , Total: 0$

I get a lot of console outputs from itsg_gf_listnumformat_js.min.js?ver=1.6.4 file about formulas and values

it seems that js is failing to convert input to currency and calculate output appropriately.
Any ideas how this can be fixed?