Can I repair this counter grout/caulk?

Noticed today that a crack has emerged in the bottom grout along my backsplash. Is this something I can just…regrout? Can I just caulk along the ledge?

Just want to make sure this isn’t indicative of a bigger issue - we bought a flip lol.

Noticed today that a crack has emerged in the bottom grout along my backsplash. Is this something I can just…regrout? Can I just caulk along the ledge?

Just want to make sure this isn’t indicative of a bigger issue - we bought a flip lol.