Very weird Synthesis/Mirage visual bug in map

This happened when I entered the map, its not inside a mirage. I use synth hideout and I'm pretty sure the visuals carried over to the actual map somehow. But in addition, the minimap is also altered, just like the synthesis effect was blocking the map like in mirage. Contrary to both visuals and the minimap, at least it doesn't actually block pathing.

I miss synthesis league, please bring it back in the future GGG <3

Video:
https://imgur.com/a/3Lybde9

After I tabbed back in to grab a bug report number, the instance server-side crashed shortly with no map recovery. It also ate my scarabs.

What's also to note, was that my stashes earlier took quite a lot of time to actually render (10 seconds), but my cpu/gpu load was not high, and neither was my latency. I think synth hideout is also needed, or potentially different hideouts could trigger different effects?