Slow internet. Modem status attached

Hello. Have had Comcast 300Mbs internet for a while now. Have noticed slow loading videos etc whcih led me to investigate through speed test. Mind you this is on a wired connection directly to modem (ARRIS SB6190) bypassing router and effectively taking that out of the equation.  Sometimes I get 300Mbs down, next second I get 2Mbps down, Then 40Mbs down etc. Not consistent. I notcied the below in the modem status page. Please advise.

 

Cannel 22 Not Locked  and Channel 21 showing really high in the Corected and Uncorrectables

 

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

 

Downstream Bonded Channels
Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Corrected	Uncorrectables
1	Locked	256QAM	27	681.00 MHz	0.40 dBmV	38.98 dB	0	0
2	Locked	256QAM	1	525.00 MHz	0.20 dBmV	31.92 dB	257	0
3	Locked	256QAM	2	531.00 MHz	-0.30 dBmV	33.96 dB	0	0
4	Locked	256QAM	3	537.00 MHz	-0.10 dBmV	37.36 dB	15	0
5	Locked	256QAM	4	543.00 MHz	0.00 dBmV	38.61 dB	0	0
6	Locked	256QAM	5	549.00 MHz	-0.10 dBmV	40.37 dB	0	0
7	Locked	256QAM	6	555.00 MHz	-0.10 dBmV	40.37 dB	0	0
8	Locked	256QAM	7	561.00 MHz	-0.30 dBmV	40.37 dB	0	0
9	Locked	256QAM	8	567.00 MHz	-0.30 dBmV	40.95 dB	0	0
10	Locked	256QAM	9	573.00 MHz	-0.30 dBmV	40.37 dB	0	0
11	Locked	256QAM	10	579.00 MHz	-0.50 dBmV	38.98 dB	0	0
12	Locked	256QAM	11	585.00 MHz	-0.50 dBmV	36.61 dB	0	0
13	Locked	256QAM	12	591.00 MHz	-0.50 dBmV	36.61 dB	0	0
14	Locked	256QAM	13	597.00 MHz	-0.50 dBmV	36.39 dB	0	0
15	Locked	256QAM	14	603.00 MHz	-0.70 dBmV	38.61 dB	0	0
16	Locked	256QAM	15	609.00 MHz	-0.30 dBmV	40.37 dB	0	0
17	Locked	256QAM	16	615.00 MHz	-0.20 dBmV	40.37 dB	0	0
18	Locked	256QAM	17	621.00 MHz	-0.20 dBmV	40.37 dB	0	0
19	Locked	256QAM	18	627.00 MHz	-0.10 dBmV	38.98 dB	0	0
20	Locked	256QAM	19	633.00 MHz	-0.20 dBmV	38.98 dB	11	0
21	Locked	256QAM	20	639.00 MHz	0.00 dBmV	31.14 dB	1142720	2444509
22	Not Locked	----	21	645.00 MHz	----	----	----	----
23	Locked	256QAM	22	651.00 MHz	0.30 dBmV	40.37 dB	0	0
24	Locked	256QAM	23	657.00 MHz	0.30 dBmV	38.98 dB	0	0
25	Locked	256QAM	24	663.00 MHz	0.20 dBmV	39.50 dB	0	0
26	Locked	256QAM	25	669.00 MHz	0.30 dBmV	39.50 dB	0	0
27	Locked	256QAM	26	675.00 MHz	0.00 dBmV	39.50 dB	0	0
28	Locked	256QAM	28	687.00 MHz	0.30 dBmV	39.50 dB	0	0
29	Locked	256QAM	29	693.00 MHz	0.60 dBmV	39.50 dB	0	0
30	Locked	256QAM	30	699.00 MHz	0.80 dBmV	39.90 dB	0	0
31	Locked	256QAM	31	705.00 MHz	0.80 dBmV	39.90 dB	0	0
32	Locked	256QAM	32	711.00 MHz	0.90 dBmV	39.50 dB	3	0

 

Upstream Bonded Channels
Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	4	5120 kSym/s	16.60 MHz	39.00 dBmV
2	Locked	ATDMA	3	5120 kSym/s	23.00 MHz	37.75 dBmV
3	Locked	ATDMA	2	5120 kSym/s	29.40 MHz	37.00 dBmV
4	Locked	ATDMA	1	5120 kSym/s	35.80 MHz	35.75 dBmV

 

 

 

and Event Log showing Lost MDD and RCS Partial Service

 

Time	Priority	Description
Mon Mar 23 20:07:13 2020	5	Lost MDD Timeout;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:07:13 2020	5	RCS Partial Service;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:07:27 2020	5	Lost MDD Timeout;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:07:27 2020	5	RCS Partial Service;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:07:29 2020	5	Lost MDD Timeout;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:07:30 2020	5	RCS Partial Service;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:07:58 2020	5	Lost MDD Timeout;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:08:00 2020	5	RCS Partial Service;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:08:40 2020	5	Lost MDD Timeout;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:08:41 2020	5	RCS Partial Service;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:09:11 2020	5	Lost MDD Timeout;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:09:11 2020	5	RCS Partial Service;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:09:23 2020	5	Lost MDD Timeout;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:09:24 2020	5	RCS Partial Service;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:10:03 2020	5	Lost MDD Timeout;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:10:04 2020	5	RCS Partial Service;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:10:11 2020	5	Lost MDD Timeout;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:10:12 2020	5	RCS Partial Service;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:10:26 2020	5	Lost MDD Timeout;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;
Mon Mar 23 20:10:26 2020	5	RCS Partial Service;CM-MAC=5c:e3:0e:3a:51:41;CMTS-MAC=00:01:5c:ac:12:79;CM-QOS=1.1;CM-VER=3.0;