Hi , I’m the guy that published the emurgo trouble ticket response 
So it said just sit tight and updates would fix the problems. That didn’t happen. I waited what seemed like epochs (they were indeed) and still had the spinning circles of death in yoroi. I was unable to see any transactions or make any pool swaps. Since I was stuck in a failing pool and earned 0 ada in epoch 18, I took it upon myself to delete the testnet wallet from chrome, re-install it and the re-enter the seeds.
When I did, all functionality in yoroi was restored and I was able to re-delegate. Also, transactions were restored. So If I had listened to emurgo and done nothing I’d still be screwed.
I know you asked about IOHK but thought this was relevant.