So while im playing this addon, quick save work just fine, but if i restart game, it dies. Is it a common issue?

Im getting this if i press f9

It's a known bug of both expansion packs.

To fix this bug, you have to replace the dlls inside the xatrix and rogue subfolders with a fixed version.

I'm not sure if there is a fixed version that works with the vanilla quake2.exe. The safest and most true to the original version is probably Yamagi Quake2.

Where i can get these fixed dlls?
I have no problem with original quake 2, quick save works there fine.
Why i have to do this anyway? Isnt this gog work?

At the sites of Yamagi Quake 2 or KMQuake II. Some old webpages mention an archive of fixed dlls for the original executable, but I haven't encountered that ominous zip file. There is no official patch. ID released patches for the base game after the release of the addons, leaving the addons unchanged.

ID decided to use native dynamic code libraries for the game code. This brings some problems, especially in coop mode, because the game code can crash the game. IDs way of implementing save games was really fragile as well. Everything was focused on speed rather than stability.

Yamagi Quake 2 fixes a huge amount of bugs even in the baseq2 game code. They've reworked the way the save system works, so you should be able to use your saves between different version (at least on the same platform; i.e. you can't load Linux saves on Windows).

Even back then these add-ons had quick save issue?

It's not only a quick save issue, it affects all save games.

I'm not sure when the problem appeared. I got Quake 1 and 2 after the release of Quake 3: Team Arena. And even then, I mostly played Quake 1 and 3. I've never played the game without this problem.

I assume save games worked at the time of both addon's release and an update to the base game broke them.

Thx for your info. I've installed Quake 2 3.24 Patch and my issue is gone :)

Just for my personal interest tested steam version of this add-on and savegame works this fine.

I can hardly understand why gog.com have worse version then steam...

Well, i took my old PC, installed Quake II from CD (3.05) > installed first add-on (3.15) > installed second add-on (3.19) and then applied patch (3.20), and saves are working.