The reason could be that the block size controversy now seems to be resolved.
Nah, I don't think it has been resolved... but how the price could be influenced by this thing (I can't understand at all...).
That prolonged low quality debate has instilled doubt in the toe-dippers and bystanders. It was never catastrophic, but they wouldn't know.
Now it seems to be resolved, the latest news being miners voting with their proverbial feet, the comments in the coinbase transactions. So I think it is resolved, by new year we have larger max blocks, and first quarter of next year we will have a large block, and minimal orphaning.
Source please. I follow the bitcoin-dev mailing list and no news of a resolution has been mentioned.