X1 box signal strength

Hi

I have continual problems with signal strength.  The symptoms are not consistent but it is annoying. The symptoms are channels freezing or pixelated and on and off internet connectivity issues.  The speed to the router is very good 1.2 - 1.8 Gbps, latency 20ms, jitter 7ms. 

Setup

1. Passive splitter from Xfinity directly after cable enters house - Antronix CMC2002H-A, 2-Way, 5-1002MHz

2. Splitter output 1 to Xfinity Modem

3. Splitter output 2 to Amplifier/Splitter, Electroline EDA2900MMA, 54-1002MHz: 1.5dB, 5-42 MHz: 1.5dB, 1125-1525 MHz: -26dB; 8 outputs, 3 used (X1 box + 2 secondary boxes)

4. Xfinity Modem (XB8-T) is in bypass mode.

5. Port 4 (2.5 Gbps capable) from Xfinity modem connected to Deco BE63 Tri-Band Wifi 7.

6. Two Deco BE63 connected to main Deco via 5/6 GHz wireless (daisy-chain).

7. My plan is Gigabit X2

Diagnostics

The X1 box signal strength is low (one bar/red) as shown on the Comcast Labs screen. The DOCSIS is provided below. (These seem to be within 

Downstream Center Freq: 411000000 hertz

Donwstream Received Power: -1.8 dBmV

Downstream Carrier Lock: operational

Downstream SNR: 42.6 TenthdB

Upstream Center Freq: 35600000 hertz

Upstream Power: 46.5 TenthdBmV

Things I've tried

1. System Refresh

2. Replaced passive splitter.

3. Replaced all Coax cables between the incoming line to the X1 box.

4. Using a different amplifier/splitter: Antronix VRA900B FWD: 52-1002 MHz: 0dB, RTN: 5-42 MHz 0dB. 

5. Removing the passive splitter and using VoIP for modem (tried both amplifiers) - This did not work at all. Modem would not connect with router.

Any advice is appreciated!