Form plugin 5.0.3 issue with capcha v3

i’m used to grav 1.6. and form 2.15.1, in this version i used capcha v2 in the form and everything work fine to me. But when upgrade to grav 1.7.17 and form 5.0.3 i update capcha v2 to capcha v3 but when i’m submit form without fill anything, the form will redirect to this page below with the same URL with the form. I want when i submit form without fill anything the form do not redirect. Anyone get me the solutions, pls !!!

Why create a separate topic instead of adding these details to the original one?