Connection drops after few minutes idle (w/ VPN)

[Douglas Silva]

My computer disconnects from the internet without giving any feedback from Network Manager.
After leaving it a few minutes idle (not long enough to suspend, although it happens when it suspends too), I come back and try to reload a webpage. That's when I notice it's not working. The applet says I'm still connected (to VPN as well).
Reconnecting solves the issue temporarily.

Affecting all Ubuntu-based distributions, so far. Running on Intel Wireless iwlwifi driver.

nmcli general:
STATE CONNECTIVITY HW-WIFI WIFI HW-WWAN WWAN
connected full enabled enabled enabled enabled

nmcli device:
DEVICE TYPE STATE CONNECTION
tun0 tun connected tun0
wlp1s0 wifi connected <my SSID>
lo loopback not manageable --

nmcli connection:
NAME UUID TYPE DEVICE
<my SSID> 5f1d464d-722c-4310-b559-a6b2d580fcde 802-11-wireless wlp1s0
PIA - Brazil 213cc0a1-2f8d-4924-aa2c-66efef0669d8 vpn wlp1s0
tun0 e7d2d861-7ba4-4194-b7a5-932a8161d194 tun tun0
PIA - AU Melbourne 5b36f393-6a86-46e1-bdff-c54475a019d2 vpn --
PIA - AU Sydney 082b847f-4a9d-4193-906a-bb4a56dfaff3 vpn --
PIA - CA Montreal 47af9e14-6b6d-4e88-955f-8580f5221bf1 vpn --
PIA - CA Toronto ab3db89d-eabd-4d50-a3ae-e60a769d45f2 vpn --
PIA - Denmark 1f1e9d19-7c5e-4f48-a4ce-c3c27c5cdb6d vpn --
PIA - Finland 461b0b4c-f2af-40b2-8516-96ce6e20271d vpn --
PIA - France 4618f8c1-d293-40e9-8f10-ca6cbd7446bd vpn --
PIA - Germany 0403ecc8-352c-4dc9-9d1b-2eb5605b005e vpn --
PIA - Hong Kong b8030a17-6cfb-440d-a9e3-b489a2614ef1 vpn --
PIA - India 34cb849f-1a92-49a1-b84c-cb31fa32c21a vpn --
PIA - Ireland d91df0f0-162a-4ee0-bf35-d5bc81036618 vpn --
PIA - Israel 267755c0-b5cd-4dfb-b8fb-8701b2079eea vpn --
PIA - Italy 0fd934ed-8a9f-49a3-9834-3d600f93a7a3 vpn --
PIA - Japan c6a035a6-ef19-49b8-9917-4d528b2abe29 vpn --
PIA - Mexico baa588f5-6138-444a-b588-80821ccac088 vpn --
PIA - Netherlands 305a6930-3d87-4f9e-8532-aae64676ad6e vpn --
PIA - New Zealand 90b945d2-53e8-486e-b3a4-cdd84000cc00 vpn --
PIA - Norway 267a41df-d75f-4842-93b4-ef14fe03f41a vpn --
PIA - Romania ef5cb093-f73a-4f95-9697-efb0975d47e4 vpn --
PIA - Singapore 57b4d7c3-53cc-41de-a215-c1c6f929a8c4 vpn --
PIA - South Korea 278db4e7-300e-454b-ade5-9e457fdfe06b vpn --
PIA - Sweden 96de2898-8db9-41ad-9c2c-6cbfc6765741 vpn --
PIA - Switzerland affd467d-bc4a-4eef-835a-3b8293466b48 vpn --
PIA - Turkey 9ea5d3f2-cc10-4464-91e4-4abe278110ef vpn --
PIA - UK London ce4e4931-77cb-4327-af23-204a84c04bb7 vpn --
PIA - UK Southampton bc1c4ce6-2cb6-497c-b826-b4d7813578c3 vpn --
PIA - US California c5db2dc0-e0b9-40b5-8b50-29c3c7bcb572 vpn --
PIA - US Chicago 6a18d9a9-3b83-4f2d-b4c9-8af7cd56b6c2 vpn --
PIA - US East 7f059e22-c833-4e97-98cc-da5b6cfffc05 vpn --
PIA - US Florida 4f6f42be-2f8f-493a-a987-c3581388dc6a vpn --
PIA - US Midwest 8d8f19cb-cd15-474d-9170-9fafd935f4a2 vpn --
PIA - US New York City 75926a05-dfed-429c-8bb9-75c8a55592f0 vpn --
PIA - US Seattle 09a240f0-ebd9-4932-aadb-71d5c37dce7b vpn --
PIA - US Silicon Valley 3e6797cb-1270-4e63-8b2c-d9355a154164 vpn --
PIA - US Texas 8d811df8-b37a-427b-bc33-4ff55ac8fc22 vpn --
PIA - US West c4c68544-acee-4469-8942-95c5fbfa4957 vpn --

[Douglas Silva (o-alquimista)]

No longer affects me.