I can't imagine that this issue is unknown but I couldn't find any reports on it. My apologies if this turns out to be double-posting.

When applying pontoons to any aircraft, the right one sticks out the front while the left one sticks out the back. Additionally, when trying to land on water, the aircraft (for lack of a better term) simply goes nuts, making it impossible to use them.

In the old Flight Simulator mod pontoons were always a fun way to travel the world without pre-built airports, so I'd like to see them back :)

It is known, but nobody has yet posted a bug on it strangely enough. There's a fix on Discord for the Official Content Pack if you don't want to wait for a release fix. I'll mark this bug down though and keep it open until that release fix day.

Where exactly can I find the fix for the official content pack (is it a file on your discord?). So far I was unfortunately unable to find anything...

It's a file on Discord, or you can download the un-zipped jar and replace the files from the repository here: https://github.com/DonBruce64/MTSOfficialPack

I've downloaded the newest version of MTS and also the content pack that you sent me.
Oddly enough though. nothing seems to have changed in terms of its pontoon behavior...

One of the Pack Authors has the fixed jar. Mr Mulle is who you want to ping.

Fixed as of latest OCP release.

Still having issues with the latest version.

Yeah, this is pending an OCP update. TBH, I really need to release a hotfix for this since it's not going to go away until we drop a new OCP, which is a variable amount of time.

Fixed with latest OCP update.