Sorry about the delay in our response. As you've mentioned that editing the identity plate in Lightroom are cutting off fonts unexpectedly.
Could you please let us know the exact version of Lightroom you're using?
Also, what is your monitor screen resolution and the does the issue occurs with default system fonts as well?
Adobe Photoshop Lightroom Classic CC version 7.4 Camera RAW 10.4 Screen resolution is 1920 x 1080 It only does it with Sign Painter Font when printing out of Lightroom
Is the "Sign Painter" font a default system font you've installed it later? I do not have such font installed to reproduce the issue.
I'll look for similar fonts and let you know if the issue is reproducible. However, if the problem persists only with. this specific font then it is most probably an issue with the font itself.
No Sign Painter is one of the Adobe fonts
I was printing cards today and it is still doing it.