My build is with wxmaster-1f3150b5f0d050262dbe132fc60d33a5e351d5b3 (25.09.2020), the issue (bigger font in popup window) isn't fixed (Miguel Gimenez wrote a reply while I'm writing). The thing is, I changed technology in the settings to DirectWrite just to check this.
Without DirectWrite, fonts are ok in popup but truncated. Font is Consolas-Regular-10. If I change font to Cascadia Mono-Regular-10, it doesn't truncated. I don't know if it's related to this topic or not.
Consolas, Arial, Georgia, Tahoma truncated.
Cascadia Mono, Calibri, Courier New not truncated.