sql server 2016 replication to AWS EC2 VM sql server error

Hello Replication experts there,

I have a strange replication issue between my on premises SQL server 2016 and AWS EC2 VM sql server 2016 express. Almost hourly I got something like this:

Date 2020-06-12 10:30:47 AM
Log Job History (<Job>)

Step ID 2
Server MySQLServer
Job Name <Job>
Step Name Run agent.
Duration 52.11:52:43
Sql Severity 0
Sql Message ID 0
Operator Emailed
Operator Net sent
Operator Paged
Retries Attempted 0

Message
Time to Apply Cmds (ms) : 5514 Cmds/Sec : 19.04
Time Spent on Schema Changes (ms) : 0
Time Cmd Queue Empty (ms) : 164456 Empty Q Waits > 10ms: 10
Total Time Request Blk(ms): 3019580
P2P Work Time (ms) : 0 P2P Cmds Skipped : 0

Reader Thread Stats
Calls to Retrieve Cmds : 582
Time to Retrieve Cmds (ms): 94 Cmds/Sec : 1117.02
Time Cmd Queue Full (ms) : 0 Full Q Waits > 10ms : 0

Article Level Parameterized Command Stats
Article Id: 1510
Number of Inserts: 0, time (ms): 0
Number of Updates: 9, time (ms): 0
Number of Deletes: 0, time (ms): 0
Number of Other Cmds (e.g. custom commands): 0, time (ms): 0
Article Id: 1515
Number of Inserts: 48, time (ms): 0
Number of Updates: 0, time (ms): 0
Number of Deletes: 48, time (ms): 0
Number of Other Cmds (e.g. custom commands): 0, time (ms): 0
*******************************************************************************

2020-08-04 05:14:11.862 <stats state="1" work="5" idle="2855"><reader fetch="0" wait="0"/><writer write="5" wait="164"/><sincelaststats elapsedtime="300" work="0" cmds="0" cmdspersec="0.000000"><reader fetch="0" wait="0"/><writer write="0" wait="15"/></sincelaststats><message>Normal events that describe both the reader and writer thread performance.</message></stats>
2020-08-04 05:15:10.612 No replicated transactions are available.
2020-08-04 05:15:37.503 1 transaction(s) with 1 command(s) were delivered.
2020-08-04 05:15:43.128 2 transaction(s) with 2 command(s) were delivered.
2020-08-04 05:16:46.894 No replicated transactions are available.
2020-08-04 05:17:50.769 No replicated transactions are available.
2020-08-04 05:18:54.566 No replicated transactions are available.
************************ STATISTICS SINCE AGENT STARTED ***********************
08-03-2020 22:19:15

Total Run Time (ms) : 3331000 Total Work Time : 6607
Total Num Trans : 63 Num Trans/Sec : 9.54
Total Num Cmds : 108 Num Cmds/Sec : 16.35
Total Skipped Cmds : 0
Total Idle Time : 3140124

Writer Thread Stats
Total Number of Retries : 0
Time Spent on Exec : 937
Time Spent on Commits (ms): 45207 Commits/Sec : 86.88
Time to Apply Cmds (ms) : 6607 Cmds/Sec : 16.35
Time Spent on Schema Changes (ms) : 0
Time Cmd Queue Empty (ms) : 182003 Empty Q Waits > 10ms: 12
Total Time Request Blk(ms): 3322127
P2P Work Time (ms) : 0 P2P Cmds Skipped : 0

Reader Thread Stats
Calls to Retrieve Cmds : 641
Time to Retrieve Cmds (ms): 94 Cmds/Sec : 1148.94
Time Cmd Queue Full (ms) : 0 Full Q Waits > 10ms : 0

Article Level Parameterized Command Stats
Article Id: 1510
Number of Inserts: 0, time (ms): 0
Number of Updates: 12, time (ms): 0
Number of Deletes: 0, time (ms): 0
Number of Other Cmds (e.g. custom commands): 0, time (ms): 0
Article Id: 1515
Number of Inserts: 48, time (ms): 0
Number of Updates: 0, time (ms): 0
Number of Deletes: 48, time (ms): 0
Number of Other Cmds (e.g. custom commands): 0, time (ms): 0
*******************************************************************************

2020-08-04 05:19:15.503 <stats state="1" work="6" idle="3140"><reader fetch="0" wait="0"/><writer write="6" wait="182"/><sincelaststats elapsedtime="303" work="1" cmds="3" cmdspersec="2.000000"><reader fetch="0" wait="0"/><writer write="1" wait="17"/></sincelaststats><message>Normal events that describe both the reader and writer thread performance.</message></stats>
2020-08-04 05:19:58.316 No replicated transactions are available.
2020-08-04 05:21:02.113 No replicated transactions are available.
2020-08-04 05:21:34.550 1 transaction(s) with 1 command(s) were delivered.
2020-08-04 05:21:45.504 18 transaction(s) with 33 command(s) were delivered.
2020-08-04 05:22:48.707 Agent message code 20046. The agent failed with a 'Retry' status. Try to run the agent at a later time.


The strange error message at the end of log:

2020-08-04 05:22:48.707 Agent message code 20046. The agent failed with a 'Retry' status. Try to run the agent at a later time.

Could anybody give me a clue of what this mean? the transactions were successfully replicated to AWS EC2 VM sql serve

Thank you for help in advance!

Steven