Need to restart my modem every few days

This has been really frustrating. Althought I have seen similar posts, but there were no concrete solution. We signed up for 1000MB internet around 2 months ago, but the speed drops to a few MB every few days; we need to restart the modem (a new ARRIS SB8200) to resolve it. I just restarted the modem and below is the tatus report:

 

Startup Procedure
Procedure	Status	Comment
Acquire Downstream Channel	603000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Configuration File	OK
Security	Enabled	BPI+
DOCSIS Network Access Enabled	Allowed

 

Downstream Bonded Channels
Channel ID	Lock Status	Modulation	Frequency	Power	SNR/MER	Corrected	Uncorrectables
17	Locked	QAM256	603000000 Hz	3.0 dBmV	41.0 dB	0	0
14	Locked	QAM256	585000000 Hz	3.3 dBmV	41.2 dB	0	0
15	Locked	QAM256	591000000 Hz	3.3 dBmV	41.1 dB	0	0
16	Locked	QAM256	597000000 Hz	3.2 dBmV	41.1 dB	0	0
18	Locked	QAM256	609000000 Hz	2.8 dBmV	40.9 dB	0	0
19	Locked	QAM256	615000000 Hz	2.7 dBmV	40.8 dB	0	0
20	Locked	QAM256	621000000 Hz	2.8 dBmV	40.9 dB	0	0
21	Locked	QAM256	627000000 Hz	2.8 dBmV	40.9 dB	0	0
22	Locked	QAM256	633000000 Hz	2.8 dBmV	40.7 dB	0	0
23	Locked	QAM256	639000000 Hz	2.8 dBmV	40.7 dB	0	0
24	Locked	QAM256	645000000 Hz	2.9 dBmV	40.7 dB	0	0
25	Locked	QAM256	651000000 Hz	2.9 dBmV	40.8 dB	0	0
26	Locked	QAM256	657000000 Hz	2.7 dBmV	40.7 dB	0	0
27	Locked	QAM256	663000000 Hz	2.8 dBmV	40.9 dB	0	0
28	Locked	QAM256	669000000 Hz	2.6 dBmV	40.7 dB	0	0
29	Locked	QAM256	675000000 Hz	2.7 dBmV	40.3 dB	0	0
30	Locked	QAM256	681000000 Hz	2.6 dBmV	40.7 dB	0	0
31	Locked	QAM256	687000000 Hz	2.8 dBmV	40.8 dB	0	0
32	Locked	QAM256	693000000 Hz	2.9 dBmV	40.8 dB	0	0
33	Locked	Other	780000000 Hz	3.4 dBmV	38.5 dB	46675592	0
34	Not Locked	QAM256	0 Hz	0.0 dBmV	40.7 dB	0	0
35	Locked	QAM256	699000000 Hz	3.1 dBmV	40.8 dB	0	0
36	Locked	QAM256	705000000 Hz	3.2 dBmV	40.9 dB	0	0
37	Locked	QAM256	711000000 Hz	3.3 dBmV	40.9 dB	0	0
38	Locked	QAM256	717000000 Hz	3.4 dBmV	40.8 dB	0	0
39	Locked	QAM256	723000000 Hz	3.2 dBmV	40.6 dB	0	0
40	Locked	QAM256	729000000 Hz	3.1 dBmV	40.7 dB	0	0
41	Locked	QAM256	735000000 Hz	3.2 dBmV	40.8 dB	2	0
42	Locked	QAM256	741000000 Hz	3.4 dBmV	40.9 dB	0	0
43	Locked	QAM256	747000000 Hz	3.7 dBmV	40.6 dB	0	0
44	Locked	QAM256	753000000 Hz	3.8 dBmV	40.7 dB	0	0
45	Locked	QAM256	759000000 Hz	3.9 dBmV	40.7 dB	0	0

 

Upstream Bonded Channels
Channel	Channel ID	Lock Status	US Channel Type	Frequency	Width	Power
1	2	Locked	SC-QAM Upstream	30100000 Hz	6400000 Hz	43.0 dBmV
2	1	Locked	SC-QAM Upstream	36500000 Hz	6400000 Hz	43.0 dBmV
3	3	Locked	SC-QAM Upstream	23700000 Hz	6400000 Hz	42.0 dBmV
4	4	Locked	SC-QAM Upstream	17300000 Hz	6400000 Hz	41.0 dBmV

 

Below is Event Log:

 

Date Time	Event ID	Event Level	Description
07/20/2020 11:45	67061600	6	"DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:01:5c:6f:a6:72;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	2436694066	6	"Honoring MDD; IP provisioning mode = IPv6"
01/01/1970 00:00	82000200	3	"No Ranging Response received - T3 time-out;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:01:5c:6f:a6:72;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	84000100	3	"SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
07/20/2020 11:44	2436694044	3	"Resetting the cable modem due to docsDevResetNow"
01/01/1970 00:00	82000200	3	"No Ranging Response received - T3 time-out;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:01:5c:6f:a6:72;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	84000100	3	"SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	82000200	3	"No Ranging Response received - T3 time-out;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:01:5c:6f:a6:72;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	84000100	3	"SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	82000200	3	"No Ranging Response received - T3 time-out;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:01:5c:6f:a6:72;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	84000100	3	"SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	82000200	3	"No Ranging Response received - T3 time-out;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:01:5c:6f:a6:72;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	84000100	3	"SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	82000200	3	"No Ranging Response received - T3 time-out;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:01:5c:6f:a6:72;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	84000100	3	"SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
07/08/2020 00:57	2436694044	3	"Resetting the cable modem due to docsDevResetNow"
01/01/1970 00:00	84000100	3	"SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	82000200	3	"No Ranging Response received - T3 time-out;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:01:5c:6f:a6:72;CM-QOS=1.1;CM-VER=3.1;"
01/01/1970 00:00	84000100	3	"SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=c8:63:fc:a1:27:79;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;"
07/03/2020 20:10	2436694044	3	"Resetting the cable modem due to docsDevResetNow"

 

Below is Internet speed test from our router (Google WiFi).