Hi @Sonchau
Welcome to the Sonos Community!
As @Airgetlam mentions, whether the Playbar is playing TV audio or is playing music is important here. TV audio shouldn’t be affected by the network at all (at least, not on the Playbar itself), so if it’s TV audio that’s cutting out, I recommend you unplug your TV from power for a couple of minutes - in the majority of cases, this will clear the issue.
Your diagnostics also showed a couple of other issues. One being your Beam being offline (at the time), the other regarding your Sub which seems to be constantly rebooting (you’d see a flashing white light).
As you have Google Mesh, I recommend a read of this article:
Specifically, if you have a router from your Internet Provider, you may need to disable DHCP and WiFi on it (Bridge/Modem mode). If this is already the case, I recommend wiring either the Playbar or the Beam to the main Google node (or to a switch connected to it) with an ethernet cable permanently. Wiring one Sonos device will change the way they all connect.
As for the Sub, I recommend you get in touch with our technical support team and report the reboots.
I hope this helps.
"Common sense is the collection of prejudices acquired by age eighteen." - Albert Einstein