Cluster goes yellow abruptly

@warkolm i think its a duplicate of Shards getting marked as stale frequently causing cluster to go yellow

I have been able to correlate it with the time when we are indexing / updating huge documents around 5-10mb. In GC logs I've been seeing humongous allocations

https://github.com/elastic/elasticsearch/pull/46169 is taken care of but the IHOP is still adaptive. So isn't it possible that InitiatingHeapOccupancyPercent may grow back to 70% and we face the same issue again?