I've encountered 2 bugs. The first was at the end of Soul Reaver before the confrontation with Kain. You must shoot two blocks from their perch in order to match the symbol on the floor with the four blocks One block landed on top of another and glitched inside of it. I had saved my game and thus cannot progress unless I start over.

The second bug is Soul Reaver 2. During certain cutscenes the screen goes black and takes several seconds or more to return to the picture.

Soul reaver 2 is a mess in comparison to 1 in terms of attention given

I've encountered the same issue during my play-through.

There is a solid black-box around the sacrifices in the Air Forge.
These only show with the remastered graphics, guess an asset it missing or has the wrong texture.

having problems where the pause/save menu pops up without my asking

seems more likely to happen just as combat starts or after a switch is flipped

really hoping this is just a setting issue, but darned if I can find it

I lost the fight when I first encountered Dumah, I did not know what I was supposed to do. I saved, quit, got back to the game the next day, now Dumah is stuck in front of his throne. He is not moving at all. My save is broken I guess :/

I can disregard any of the visual glitches, but there are a lot of game breaking bugs that prevented me from completing the game.
I only tried Soul Reaver 1, havent even touched the second one yet.

1. Just before the second boss, when i tried to flip a box next to the wall, i got out of bounds with a completely black screen, and was not able to return. When i saved the game at that point, and tried to reload it, it crashes the game and goes back to desktop.

2. Last puzzle before final boss battle, ( boxes that have to be arranged to match the bottom image ) cannot be completed because the box from the top platform disappeared when pushed to fall down.

No communication, no patch, looks like we got the good ol' pump and dump.

Situation worse cause it is GOG and Galaxy issues. You wont get fix (per game side, by game devs) for that. And GOG dont care for years. Idk what they thinking. For PC-Win GOG Galaxy probably still best app-client based storefront/launcher, best as just Games Library launcher (3rd party). But there is EGS and EGS versions of the games usually properly builded (builds by publishers, not GOG). And there is more stores, including with Linux client (that one start with Z).

Worst, better. Anything would not matter of nothing work at all. Like in Steam. I dont understand why GOG make Galaxy be another broken Steam.

Downgrade your Galaxy client. Usually 1.2.x version suggested. Just a bit older 2.x.x probably fine too, but its up to your experiments if you ready to.