Relay errors with exist key id

After upgrade to version 20.12.1 (from 9.1.2) i see in relay logs errors, despite the fact that new events in Sentry appear:

2021-01-04T15:36:20Z [relay_server::actors::events] ERROR: project state for key 69be795c63e848dba51a12e66a53a6f0 is missing key id
2021-01-04T15:36:20Z [relay_server::actors::events] ERROR: project state for key 69be795c63e848dba51a12e66a53a6f0 is missing key id
2021-01-04T15:36:20Z [relay_server::actors::events] ERROR: project state for key 69be795c63e848dba51a12e66a53a6f0 is missing key id
2021-01-04T15:36:20Z [relay_server::actors::events] ERROR: project state for key 69be795c63e848dba51a12e66a53a6f0 is missing key id
2021-01-04T15:36:20Z [relay_server::actors::events] ERROR: project state for key 69be795c63e848dba51a12e66a53a6f0 is missing key id
2021-01-04T15:36:35Z [relay_server::actors::events] ERROR: project state for key 240c0ff5301d4c8fa78e9acc9b19e028 is missing key id
2021-01-04T15:36:35Z [relay_server::actors::events] ERROR: project state for key 240c0ff5301d4c8fa78e9acc9b19e028 is missing key id
2021-01-04T15:36:35Z [relay_server::actors::events] ERROR: project state for key 839748166bb94c3a9e7550dc46e0a09a is missing key id

and this key id is exist in Sentry:

@jauer, @untitaker - thoughts?