Graph image contains errors

Thanks and congratulations to all for this great project.

Unable to determine when it broke. I have applied two consecutive upgrades via docker pull, and maybe I lose something doing git pull from this installation - > Librenms docker

All great, no error on upgrading, only all graph now are broken.

Seems that poller is updating files correclty, rrd files seems good

checking rrd files
compose git:(master)  docker exec -it librenms bash 
bash-5.0# ls -l /data/rrd/
-rw-r--r-- 1 librenms librenms 125000 Feb  7 08:32 /data/rrd/
bash-5.0# rrdtool fetch /data/rrd/  AVERAGE | tail
1612680600: 9.1398446812e+06
1612680900: 9.1401450904e+06
1612681200: 9.1404487341e+06
1612681500: 9.1407440241e+06
1612681800: 9.1410449548e+06
1612682100: 9.1413445923e+06
1612682400: 9.1416450847e+06
1612682700: 9.1419448410e+06
1612683000: 9.1422446194e+06
1612683300: -nan
bash-5.0# date
Sun Feb  7 08:34:43 CET 2021
bash-5.0# date +%s
bash-5.0# su librenms
/opt/librenms $ ./validate.php 
Component | Version
--------- | -------
LibreNMS  | 21.1.0
DB Schema | 2020_11_02_164331_add_powerstate_enum_to_vminfo (191)
PHP       | 7.3.26
Python    | 3.8.5
MySQL     | 10.4.17-MariaDB-1:10.4.17+maria~focal
RRDTool   | 1.7.2
SNMP      | NET-SNMP 5.8

[OK]    Installed from the official Docker image; no Composer required

[OK]    Database connection successful
[OK]    Database schema correct
[WARN]  IPv6 is disabled on your server, you will not be able to add IPv6 devices.
[WARN]  Global lnms shortcut not installed. lnms command must be run with full path
	sudo ln -s /opt/librenms/lnms /usr/bin/lnms
[WARN]  Log rotation not enabled, could cause disk space issues
	sudo cp /opt/librenms/misc/librenms.logrotate /etc/logrotate.d/librenms
[WARN]  Updates are managed through the official Docker image
/opt/librenms $ 

memory usage with ui log

All images are downloaded with 200 response code

all images downl

docker ps
compose git:(master)  docker ps
CONTAINER ID        IMAGE                      COMMAND                  CREATED             STATUS                    PORTS                                                  NAMES
6f95acf2fb6b        librenms/librenms:latest   "/init"                  6 minutes ago       Up 36 seconds   >514/tcp,>514/udp, 8000/tcp   librenms_syslogng
f91e7dbcbdc4        librenms/librenms:latest   "/init"                  6 minutes ago       Up 36 seconds             514/tcp, 8000/tcp, 514/udp                             librenms_dispatcher
4f89160290fc        librenms/librenms:latest   "/init"                  6 minutes ago       Up 39 seconds             514/tcp, 514/udp,>8000/tcp               librenms
2787ca15d7f7        redis:5.0-alpine           "docker-entrypoint.s…"   6 minutes ago       Up 40 seconds             6379/tcp                                               librenms_redis
3d8874606a30        crazymax/msmtpd:latest     "/init"                  6 minutes ago       Up 41 seconds (healthy)   2500/tcp                                               librenms_msmtpd
3adca791e9f0        mariadb:10.4               "docker-entrypoint.s…"   6 minutes ago       Up 41 seconds             3306/tcp                                               librenms_db
9f81d87977f2        memcached:alpine           "docker-entrypoint.s…"   6 minutes ago       Up 41 seconds             11211/tcp                                              librenms_memcached

Any idea what’s happening?
Caching of graph…?

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