Found this on the Bath discussion site from August
When the UK leaves the EU, Kolpak players � those from abroad who do not count as overseas players � will be abolished. Existing Kolpak players would be allowed to remain under these terms during a transitional period between the UK and EU, which has been proposed to end in January 2021.
As soon as Brexit is complete, no new players will be able to sign under Kolpak terms. Existing Kolpak players would only be eligible in 2020 if they remain with their current clubs, said Rose Carey, an immigration lawyer from Charles Russell Speechlys. In the event of a no-deal Brexit, then no new Kolpak players would be able to sign from the day that the UK left the EU.
The future of Kolpak players is in doubt. The Cotonou Agreement � which allows citizens from 78 African, Caribbean and Pacific countries to work in the EU if they have a valid work permit � expires in February. It has yet to be renewed.
Either if the Cotonou Agreement is not renewed, or the UK leaves the EU without negotiating an agreement allowing those from the nations who signed Cotonou to continue to work in the UK, Kolpak contracts would cease to be valid after the 2020 season.
Whether Covid 19 will have any impact in delaying the above I don't know.’
Maybe that’s why there has been a rush to sign players before cut off?