LoRa frames not received, "zero items in collect set"

[cdupont]

No LoRa frames are received on Chirpstack UI.

chirpstack-network-server logs:

2021-09-06T16:46:11.869473723Z time="2021-09-06T16:46:11Z" level=info msg="gateway/mqtt: uplink frame received" gateway_id=aa55a00000000000 uplink_id=3a67d3cd-f4e0-4c34-8288-eb60bd8b31ae
2021-09-06T16:46:21.873209553Z time="2021-09-06T16:46:21Z" level=error msg="uplink: processing uplink frame error" ctx_id=9cf90abf-c1e0-4983-bc71-1c3e31d64fd8 error="zero items in collect set"

The date is wrong in the redis container:

$ docker exec -it redis date
Wed Jun 24 22:30:40 CEST 2071

[cdupont]

It seems to be linked to this problem:
https://stackoverflow.com/questions/66091978/corrupt-date-with-redis6-alpine-on-raspi
Solution is to either update libseccomp and Docker, or use an older image of redis.