As the topic states there is currently a bug in-game with the Rogue class specifically and being able to discover Invoke spells.
As per Blizzard post 17.0 you should be able to discover invoke spells, assuming Galakrond is in your deck. This stated with me playing ~20 ladder games with gala rogue this month and realizing I hadn’t seen a single invoke spell from a spell lackey in 20 games. On its own this isn’t that crazy unlikely - assuming 1 spell lackey per game I’m only at about a 73% chance to find 1 or more invoke spells.
So next I created a deck specifically to test my theory and took it to casual, this included Vulpera Scoundrel, lots of bounces to test my theory. I am now at over 100 discovers without seeing a single invoke spell. Which by using math we can calculate the probability that I would have seen 1 or more by now is 99.885979216%
Checked against HSReplay data from Vulpera Scoundrel in the past week:
Setting aside the few anomalies, Time Rip is notably absent as well. However, the OP in the thread reported being able to discover spells with all other classes besides Rogue:
Update - have been able to discover invoke spells with the other 4 classes. Seems to only be Rogue.
Exact details are still unclear and more data would be helpful (Is it just Discover affected? Is it just spells?) but either way something is clearly wrong here.
https://us.forums.blizzard.com/en/hearthstone/t/not-discovering-invoke-spells-with-rogue/34577
Checked against HSReplay data from Vulpera Scoundrel in the past week:
Setting aside the few anomalies, Time Rip is notably absent as well. However, the OP in the thread reported being able to discover spells with all other classes besides Rogue:
Exact details are still unclear and more data would be helpful (Is it just Discover affected? Is it just spells?) but either way something is clearly wrong here.