My game was automatically forfeited for losing connection for a few seconds

Such a warning doesn't mean anything, it's an automated warning. Lichess would probably ban you if this was to happen something like 100 times, so you don't have to worry.

Bro (@Bat_Hawk), Lichess is a non profit organisation, and it maintains servers which are faster then many other paid websites.
Dont worry about 1-2 or even 5 odd warnings which are mostly system generated and even though with no actual fault of yours.
Abandoning 1-2 games due to technical hick-ups is not an issue. Cheating/computer assistance is a more serious issue.

So let developers focus on improving the site and Just enjoy the quality chess here.
Lets not bother developers with petty problems of mine and yours.

@captdks Just to give you some feedback, you're comment is literally off-topic. @Bat_Hawk has a legitimate question, and wants it answered by a Lichess mod (thus the reference to devs is off-topic), which is understandable, as the internet can be sometimes weird. You basically just written the same as I did and extended it.