Funimation had done the same and most, if not all, of those titles have seen release through the distributor.
Way back in 2013 during Otakon, Sentai Filmworks revealed that they had picked up multiple licenses from the Sunrise catalog that were licensed before by Bandai Entertainment in North America.
After all, look at what happened with some other Sunrise titles recently.
Thankfully, the SDBD was canceled and we ended up with the proper Blu-ray earlier this year.