Looks like this was introduced in version 0~20190606.20d2e5a1-2. It also does not appear to impact the /usr/share/OVMF/OVMF_CODE.fd image.
- Bug#939928: ovmf 0~20190606.20d2e5a1-4: VM does... Stefan Pietsch
- Bug#939928: #939928: newer version also br... Mara Sophie Grosch
- Bug#939928: version bisect dann frazier
- Bug#939928: marked as done (ovmf 0~2019060... Debian Bug Tracking System