What motherboard and BIOS version do you have? List your full system specs.
1.5V is high for most Ryzen chips especially at low utilization, however to make sure you are getting a correct reading I would download Ryzen Master and see what voltage it reports.
https://www.amd.com/en/products/software/ryzen-master.html#download
Ryzen R7 5700X | B550 Gaming X | 2x16GB G.Skill 3600 | Radeon RX 7900XT
Ryzen R7 5700G | B550 Gaming X | 2x8GB G.Skill 4000 | Radeon Vega 8 IGP
Ryzen R5 5600 | B550 Gaming Edge | 4x8GB G.Skill 3600 | Radeon RX 6800XT