Google assistant project gone

today, out of the sudden, my google assistant project was not working anymore, my lights and stuff
ok, so i did a 'sync my devices" command

it gave my an issue, error synching…
ok, unlinked the project (tets)
wanted to relink again
seems the test project was not in the list anymore
so restarted HA, didnt help
so went to : , and seems there was no draft anymore
started the simulator again, created a new draft; then the project was visible again…

is this normal behaviour? is the draft/project limited in time?